MIRAGE - Et integrert AI-basert system for avansert musikkanalyse (avsluttet)

• Anna-Maria Christodoulou & Olivier Lartillot (2025). A Multimodal Dataset of Greek Folk Music. I Elsa De Luca (Red.), DLfM '25: Proceedings of the 12th International Conference on Digital Libraries for Musicology. Association for Computing Machinery (ACM). ISSN 9798400720833. s. 19–27. doi: https:/dl.acm.org/doi/10.1145/3748336.3748339. Fulltekst i vitenarkiv Vis sammendrag

  This paper presents a multimodal dataset of Greek folk dance music, focusing on syrtos and balos. Developed to support research in computational musicology, the dataset improves access to Greek musical heritage through manually transcribed MIDI scores, aligned lyrics, and rich metadata, all curated by expert musicologists. Through pattern analysis and feature extraction, we examine both shared melodic structures and unique characteristics of each dance, with some examples reflecting traces of oral transmission. While metadata accompanies the collection to support organization and context, our primary emphasis is on the musical and lyrical content. This work contributes to digital ethnomusicology by showing how multimodal datasets of folk music can inform both analytical research and cultural heritage preservation.

• Anna-Maria Christodoulou, Kyrre Glette, Olivier Lartillot & Alexander Refsum Jensenius (2025). MusiQAl: A Dataset for Music Question–Answering through Audio–Video Fusion. Transactions of the International Society for Music Information Retrieval. 8(1), s. 265–282. doi: 10.5334/tismir.222. Fulltekst i vitenarkiv Vis sammendrag

  Music question–answering (MQA) is a machine learning task where a computational system analyzes and answers questions about music‑related data. Traditional methods prioritize audio, overlooking visual and embodied aspects crucial to music performance understanding. We introduce MusiQAl, a multimodal dataset of 310 music performance videos and 11,793 human‑annotated question–answer pairs, spanning diverse musical traditions and styles. Grounded in musicology and music psychology, MusiQAl emphasizes multimodal reasoning, causal inference, and cross‑cultural understanding of performer–music interaction. We benchmark AVST and LAVISH architectures on MusiQAI, revealing strengths and limitations, underscoring the importance of integrating multimodal learning and domain expertise to advance MQA and music information retrieval.

• Olivier Lartillot, Dana Swarbrick, Finn Upham & Carlos Eduardo Cancino-Chacón (2025). Video Visualization of a String Quartet Performance of a Bach Fugue: Design and Subjective Evaluation. Music & Science. 8. doi: 10.1177/20592043251352299. Fulltekst i vitenarkiv Vis sammendrag

  Visualizing music—through music notation, analytical representations, or music videos—might potentially boost the appreciation of music in all its richness. The purpose of this study was to design and test a visualization strategy aimed at explicating to a large audience with diverse backgrounds—especially novices—the multifaceted beauty of the final Contrapunctus in J.S. Bach's The Art of Fugue, performed by the Danish String Quartet. At the surface level of the musical structure, the rich fluctuation of pitch shaped by each musician was depicted in the form of undulating pitch curves. At a deeper structural level, the repetition of pitch curves, distinctive of fugues, was highlighted through vertical alignment—inspired by a technique called paradigmatic analysis, originating from anthropology and music semiology. The visualization was initially prototyped in the form of a real-time technology as part of the MusicLab Copenhagen research concert. The concert audience focused on the performance itself, and did not pay much attention to, nor appreciate, the visualization. To evaluate more thoroughly the potential of the visualization, participants with varied musical expertise and taste were invited to listen to a recorded performance of the piece and watch the visualization on their own computer. A large majority reported that they felt they understood the visualization, around half of them felt that it enhanced their musical understanding, and a small group felt that it helped them to better appreciate the music.

• Olivier Lartillot (2024). Musicological and Technological Perspectives on Computational Analysis of Electroacoustic Music. I Alexander Refsum Jensenius (Red.), Sonic Design: Explorations Between Art and Science. Springer Nature. ISSN 9783031578922. s. 271–297. doi: 10.1007/978-3-031-57892-2_15. Fulltekst i vitenarkiv Vis sammendrag

  Analysing electroacoustic music remains challenging, leaving this artistic treasure somewhat out of reach of mainstream musicology and many music lovers. This chapter examines electroacoustic music analysis, covering musicological investigations and desires and technological challenges and potentials. The aim is to develop new technologies to overcome the current limitations. The compositional and musicological foundations of electroacoustic music analysis are based on Pierre Schaeffer’s Traité des objects musicaux. The chapter presents an overview of core analytical principles underpinning more recent musicological approaches, including R. Murray Schafer’s soundscape analysis, Denis Smalley’s spectro-morphology, and Lasse Thoresen’s graphical formalisation. Then the state of the art in computational analysis of electroacoustic music is compiled and organised along broad themes, from detecting sound objects to estimating dynamics, facture and grain, mass, motions, space, timbre and rhythm. Finally, I sketch the principles of what could be a Toolbox des objets sonores.

• Hans-Hinrich Thedens & Olivier Lartillot (2023). AudioSegmentor: Et verktøy for formidling av arkivopptak på nettet. Studia Musicologica Norvegica. ISSN 0332-5024. 49(1), s. 92–101. doi: 10.18261/smn.49.1.7. Fulltekst i vitenarkiv Vis sammendrag

  Norske folkemusikkarkiver står foran utfordringer vedrørende å gjøre sine samlinger tilgjengelige på nett når feltopptak faller i det fri etter 50 år. Denne artikkelen beskriver et forsøk på å tilrettelegge brukskopier i form av lydfiler slik at brukerne kan lytte til enkeltopptak i en nettpresentasjon av et arkivs innhold. Lydklassifiseringsteknologi er i stand til å finne og markere starttidspunkt på enkeltmelodier og spare arkivpersonalet for mange timers manuelt arbeid. Mirage-prosjektet på UiOs RITMO-senter har utviklet et grensesnitt for et slikt verktøy for Nasjonalbibliotekets folkemusikkarkiv og dets nettkatalog WebbFIOL. Løsningen vil kunne tas i bruk av alle som står overfor liknende utfordringer.

• Laura Bishop, Simon Høffding, Olivier Serge Gabriel Lartillot & Bruno Laeng (2023). Mental Effort and Expressive Interaction in Expert and Student String Quartet Performance. Music & Science. 6. doi: 10.1177/20592043231208000. Fulltekst i vitenarkiv
• Olivier Lartillot, Mats Sigvard Johansson, Anders Elowsson, Lars Løberg Monstad & Mattias Storås Cyvin (2023). A Dataset of Norwegian Hardanger Fiddle Recordings with Precise Annotation of Note and Beat Onsets. Transactions of the International Society for Music Information Retrieval. 6(1), s. 186–202. doi: 10.5334/TISMIR.139. Fulltekst i vitenarkiv
• Clemens Maidhof, Viktor Müller, Olivier Lartillot, Kat Agres, Jodie Bloska & Rie Asano [Vis alle 8 forfattere av denne artikkelen] (2023). Intra- and inter-brain coupling and activity dynamics during improvisational music therapy with a person with dementia: an explorative EEG-hyperscanning single case study. Frontiers in Psychology. 14. doi: 10.3389/fpsyg.2023.1155732. Fulltekst i vitenarkiv
• Alexander Szorkovszky, Frank Veenstra, Olivier Serge Gabriel Lartillot, Alexander Refsum Jensenius & Kyrre Glette (2023). Embodied Tempo Tracking with a Virtual Quadruped, Proceedings of the Sound and Music Computing Conference 2023. SMC Network . ISSN 9789152773727. doi: 10.5281/zenodo.10060970. Fulltekst i vitenarkiv Vis sammendrag

  Dynamic attending theory posits that we entrain to time-structured events in a similar way to synchronizing oscillators. Hence, a tempo tracker based on oscillators may replicate humans' ability to rapidly and robustly identify musical tempi. We demonstrate this idea using virtual quadrupeds, whose gaits are controlled by oscillatory neural circuits known as central pattern generators (CPGs). The quadruped CPGs were first optimized for flexible gait frequency and direction, and then an additional recurrent layer was optimized for entrainment to isochronous pulses. Using excerpts of musical pieces, we find that the motion of these agents can rapidly entrain to simple rhythms. Performance was found to be partially predicted by pulse entropy, a measure of the sample's rhythmic complexity. Notably, in addition to having wide tempo ranges, the best performing agents can also entrain to rhythms that are periodic but not quantized on a grid. Our approach offers an embodied alternative to other dynamical systems-based approaches to entrainment, such as gradient-frequency arrays. Such agents could find use as participants in virtual musicking environments, or as real-world musical robots.

• Olivier Lartillot, Anders Elovsson, Mats Sigvard Johansson, Hans-Hinrich Thedens & Lars Alfred Løberg Monstad (2022). Segmentation, Transcription, Analysis and Visualisation of the Norwegian Folk Music Archive. I Laurent Pugin (Red.), DLfM '22: 9th International Conference on Digital Libraries for Musicology. Association for Computing Machinery (ACM). ISSN 9781450396684. s. 1–9. doi: 10.1145/3543882.3543883. Fulltekst i vitenarkiv Vis sammendrag

  We present an ongoing project dedicated to the transmutation of a collection of field recordings of Norwegian folk music established in the 1960s into an easily accessible online catalogue augmented with advanced music technology and computer musicology tools. We focus in particular on a major highlight of this collection: Hardanger fiddle music. The studied corpus was available as a series of 600 tape recordings, each tape containing up to 2 hours of recordings, associated with metadata indicating approximate positions of pieces of music. We first need to retrieve the individual recording associated with each tune, through the combination of an automated pre-segmentation based on sound classification and audio analysis, and a subsequent manual verification and fine-tuning of the temporal positions, using a home-made user interface. Note detection is carried out by a deep learning method. To adapt the model to Hardanger fiddle music, musicians were asked to record themselves and annotate all played note, using a dedicated interface. Data augmentation techniques have been designed to accelerate the process, in particular using alignment of varied performances of same tunes. The transcription also requires the reconstruction of the metrical structure, which is particularly challenging in this style of music. We have also collected ground-truth data, and are conceiving a computational model. The next step consists in carrying out detailed music analysis of the transcriptions, in order to reveal in particular intertextuality within the corpus. A last direction of research is aimed at designing tools to visualise each tune and the whole catalogue, both for musicologists and general public.

• Patrik N. Juslin, Laura S. Sakka, Gonçalo T. Barradas & Olivier Lartillot (2022). Emotions, mechanisms, and individual differences in music listening: A stratified random sampling approach. Music Perception. ISSN 0730-7829. 40(1), s. 55–86. doi: 10.1525/mp.2022.40.1.55. Fulltekst i vitenarkiv Vis sammendrag

  Emotions have been found to play a paramount role in both everyday music experiences and health applications of music, but the applicability of musical emotions depends on: 1) which emotions music can induce, 2) how it induces them, and 3) how indi- vidual differences may be explained. These questions were addressed in a listening test, where 44 participants (aged 19–66 years) reported both felt emotions and subjective impressions of emotion mechanisms (Mec Scale), while listening to 72 pieces of music from 12 genres, selected using a stratified random sampling pro- cedure. The results showed that: 1) positive emotions (e.g., happiness) were more prevalent than negative emotions (e.g., anger); 2) Rhythmic entrainment was the most and Brain stem reflex the least frequent of the mechanisms featured in the BRECVEMA theory; 3) felt emotions could be accurately predicted based on self- reported mechanisms in multiple regression analyses; 4) self-reported mechanisms predicted felt emotions better than did acoustic features; and 5) individual listeners showed partly different emotion-mechanism links across stimuli, which may help to explain individual differences in emotional responses. Implications for future research and applications of musical emotions are discussed.

• Olivier Lartillot, Kristian Nymoen, Guilherme Schmidt Câmara & Anne Danielsen (2021). Computational localization of attack regions through a direct observation of the audio waveform. Journal of the Acoustical Society of America. ISSN 0001-4966. 149(1), s. 723–736. doi: 10.1121/10.0003374. Fulltekst i vitenarkiv Vis sammendrag

  This article addresses the computational estimation of attack regions in audio recordings. Previous attempts to do so were based on the reduction of the audio waveform into an envelope curve, which decreases its temporal resolution. The proposed approach detects the attack region directly from the audio waveform. The attack region is modeled as a line starting from a low-amplitude point and intersecting one of the local maxima according to two principles: (1) maximizing the slope, while favoring, at the same time, a higher peak if the slope remains only slightly lower and (2) dismissing initial attack regions of relatively low amplitude. The attack start position is fine-tuned by intersecting the attack slope with the audio waveform. The proposed method precisely pinpoints the attack region in cases where it is unambiguously observable from the waveform itself. In such cases, previous methods selected a broader attack region due to the loss of temporal resolution. When attack regions are less evident, the proposed method’s estimation remains within the range of results provided by other methods. Applied to the prediction of judgments of P-center localization [Danielsen, Nymoen, Anderson, C^amara, Langerød, Thompson, and London, J. Exp. Psychol. Hum. Percept. Perform. 45, 402–418 (2019)], the proposed method shows a significant increase in precision, at the expense of recall.

• Mari Romarheim Haugen (2021). Investigating Music-Dance Relationships. A Case Study of Norwegian Telespringar. Journal of music theory. ISSN 0022-2909. 65(1), s. 17–38. doi: 10.1215/00222909-9124714. Fulltekst i vitenarkiv Vis sammendrag

  This article studies the rhythm of Norwegian telespringar, a tradition with an intimate relationship between music and dance that features a nonisochronous meter; that is, the durations between adjacent beats are unequal. A motion-capture study of a fiddler and dance couple revealed a long-medium-short duration pattern at the beat level in both the fiddler's and the dancers' periodic movements. The results also revealed a correspondence between how the fiddler and the dancers executed the motion patterns. This correspondence suggests that the performers share a common understanding of the underlying “feel” of the music. The results are discussed in light of recent theoretical perspectives on the multimodality of human perception. It is argued that the special feel of telespringar derives from embodied sensations related to the dance and how music and dance have developed in tandem over time. The study advocates a holistic view of music and dance, the importance of insider experience, and the role of embodied experience in guiding our understanding of the music as such.

• Olivier Lartillot (2021). Computational Musicological Analysis of Notated Music: a Brief Overview. Nota Bene. ISSN 1891-4829. 15, s. 142–161. Fulltekst i vitenarkiv Vis sammendrag

  I present a short overview of computational methods for musicological analysis of notated music. We first need to clarify the various levels of computational representations of music: on one side, notated music, on the other, audio recordings, and in the middle, a note-level representa- tion of music performance where higher-level musical descriptions are absent. The article provides a synthetic and partial panorama of the different types of music analysis that have been systematised and auto- mated using computers. While pioneering works were mainly focused on statistical descriptions of the surface of music, other dimensions of music analysis such as harmony, metre and structure have been taken into consideration since. I conclude by sketching my personal vision of the future of computational music analysis.

• Anders Elovsson & Olivier Lartillot (2021). A Hardanger Fiddle Dataset with Performances Spanning Emotional Expressions and Annotations Aligned using Image Registration, Proceedings of the 22nd International Society for Music Information Retrieval Conference, Online, Nov 7-12, 2021. International Society for Music Information Retrieval. ISSN 9781732729902. s. 174–181. Fulltekst i vitenarkiv Vis sammendrag

  This paper presents a Hardanger fiddle dataset “HF1” with polyphonic performances spanning five different emotional expressions: normal, angry, sad, happy, and tender. The performances thus cover the four quadrants of the activity/valence-space. The onsets and offsets, together with an associated pitch, were human-annotated for each note in each performance by the fiddle players themselves. First, they annotated the normal version. These annotations were then transferred to the expressive performances using music alignment and finally human-verified. Two separate music alignment methods based on image registration were developed for this purpose; a B-spline implementation that produces a continuous temporal transformation curve and a Demons algorithm that produces displacement matrices for time and pitch that also account for local timing variations across the pitch range. Both methods start from an “Onsetgram” of onset salience across pitch and time and perform the alignment task accurately. Various settings of the Demons algorithm were further evaluated in an ablation study. The final dataset is around 43 minutes long and consists of 19 734 notes of Hardanger fiddle music, recorded in stereo. The dataset and source code are available online. The dataset will be used in MIR research for tasks involving polyphonic transcription, score alignment, beat tracking, downbeat tracking, tempo estimation, and classification of emotional expressions.

• Stéphanie Weisser, Olivier Lartillot & Hélène Sechehaye (2021). Investiguer la grésillance. Pour une approche ethno-acoustique du timbre musical. Cahiers d'ethnomusicologie. ISSN 2235-7688. 34, s. 37–58. Fulltekst i vitenarkiv Vis sammendrag

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• Olivier Lartillot & Fred Bruford (2020). Bistate reduction and comparison of drum patterns, Proceedings of the 21st International Society for Music Information Retrieval (ISMIR) Conference. McGill-Queen's University Press. ISSN 9780981353708. s. 318–324. Fulltekst i vitenarkiv Vis sammendrag

  This paper develops the hypothesis that symbolic drum patterns can be represented in a reduced form as a sim- ple oscillation between two states, a Low state (commonly associated with kick drum events) and a High state (often associated with either snare drum or high hat). Both an onset time and an accent time is associated to each state. The systematic inference of the reduced form is formal- ized. This enables the specification of a rhythmic struc- tural similarity measure on drum patterns, where reduced patterns are compared through alignment. The two-state representation allows a low computational cost alignment, once the complex topological formalization is fully taken into account. A comparison with the Hamming distance, as well as similarity ratings collected from listeners on a drum loop dataset, indicates that the bistate reduction enables to convey subtle aspects that goes beyond surface-level com- parison of rhythmic textures.

• Fred Bruford & Olivier Lartillot (2020). Multidimensional similarity modelling of complex drum loops using the GrooveToolbox, Proceedings of the 21st International Society for Music Information Retrieval (ISMIR) Conference. McGill-Queen's University Press. ISSN 9780981353708. s. 263–270. Fulltekst i vitenarkiv Vis sammendrag

  The GrooveToolbox is a new Python toolbox implementing various algorithms, new and pre-existing, for the analysis and comparison of symbolic drum loops, including rhythm features, similarity metrics and microtiming features. As part of the GrooveToolbox we introduce two new metrics of rhythm similarity and four features for describing the significant properties of microtiming deviations in drum loops. Based on a two-part perceptual evaluation, we show these four new microtiming features can each correlate to similarity perception, and be used with rhythm similarity metrics to improve personalized similarity models for drum loops. A new measure of structural rhythmic similarity is also shown to correlate more strongly to similarity perception of drum loops than the more com- monly used Hamming distance. These results point to the potential application of the GrooveToolbox and its new features in drum loop analysis for intelligent music production tools. The GrooveToolbox may be found at: https://github.com/fredbru/GrooveToolbox

• Karl Anders Elovsson (2020). Polyphonic pitch tracking with deep layered learning. Journal of the Acoustical Society of America. ISSN 0001-4966. 148(1), s. 446–468. doi: 10.1121/10.0001468. Fulltekst i vitenarkiv Vis sammendrag

  This article presents a polyphonic pitch tracking system that is able to extract both framewise and note-based estimates from audio. The system uses several artificial neural networks trained individually in a deep layered learning setup. First, cascading networks are applied to a spectrogram for framewise fundamental frequency (f0) estimation. A sparse receptive field is learned by the first network and then used as a filter kernel for parameter sharing throughout the system. The f0 activations are connected across time to extract pitch contours. These contours define a framework within which subsequent networks perform onset and offset detection, operating across both time and smaller pitch fluctuations at the same time. As input, the networks use, e.g., variations of latent representations from the f0 estimation network. Finally, erroneous tentative notes are removed one by one in an iterative procedure that allows a network to classify notes within a correct context. The system was evaluated on four public test sets: MAPS, Bach10, TRIOS, and the MIREX Woodwind quintet and achieved state-of-the-art results for all four datasets. It performs well across all subtasks f0, pitched onset, and pitched offset tracking.

• Olivier Lartillot, Carlos Cancino-Chacón & Charles Brazier (2020). Real-Time Visualisation Of Fugue Played By A String Quartet. I Simone Spagnol & Andrea Valle (Red.), Proceedings of the 17th Sound and Music Computing Conference. Axea sas/SMC Network. ISSN 9788894541502. s. 115–122. Fulltekst i vitenarkiv Vis sammendrag

  We present a new system for real-time visualisation of music performance, focused for the moment on a fugue played by a string quartet. The basic principle is to offer a visual guide to better understand music using strategies that should be as engaging, accessible and effective as possible. The pitch curves related to the separate voices are drawn on a space whose temporal axis is normalised with respect to metrical positions, and aligned vertically with respect to their thematic and motivic classification. Aspects related to tonality are represented as well. We describe the underlying technologies we have developed and the technical setting. In particular, the rhythmical and structural representation of the piece relies on real-time polyphonic audio-to-score alignment using online dynamic time warping. The visualisation will be presented at a concert of the Danish String Quartet, performing the last piece of The Art of Fugue by Johann Sebastian Bach.

Se alle arbeider i NVA

• Olivier Lartillot & Anders Elovsson (2025). Annotemus User’s Guide. Universitetet i Oslo. doi: https:/www.uio.no/ritmo/english/projects/mirage/software/annotemus/guide0.7.2.pdf. Fulltekst i vitenarkiv Vis sammendrag

  Annotemus is a new software for computer-assisted annotation of music recordings, with a focus on transcription. Annotemus features a graphical user interface providing functionality for creating annotations on top of a graphical representation of an audio file. Annotation aids include audio playback of the current window, playback between the start and end of one or several selected notes, playback that starts prior to a selected annotated note and ends at the annotated onset position, playback with a click at each annotated onset position, and playback with a synthesized version of the annotated score played in one of the stereo channels. All playback functionality is offered with the option of slowing it down to various speeds.

Se alle arbeider i NVA

• Olivier Lartillot (2025). Computational music analysis. Fulltekst i vitenarkiv
• Thomas Wosch, Bastian Vobig & Olivier Lartillot (2025). Human Interaction assessment and Generative segmentation in Health & Music. doi: https:/www.youtube.com/watch?v=I4jaZIzX0wg. Fulltekst i vitenarkiv Vis sammendrag

  Improvisation in music therapy has been shown to be an effective technique for engaging clients in emotionally rooted (inter)action to treat affective disorders such as major depression (Aalbers et al., 2017; Erkkilä et al., 2011). During improvisation, however, a variety of musical information is exchanged, resulting in a highly complex musical and interpersonal situation. While traditional models of music therapy analysis emphasise aural analysis and assessment of single sessions (Bruscia, 1987), more recent and elaborated methods, such as microanalysis, focus on the detailed development of improvisation sessions (Wosch, 2021; Wosch & Erkkilä, 2016), which comes at the cost of a more time-consuming application process. Digital processing, as in music information retrieval and machine learning, seems promising to accelerate the analysis process, but requires considerable preliminary work in data preprocessing and formalisation of the high-level concepts used in music therapy to develop a suitable dataset for model training. Moreover, additional benefits of digital processing comprehend a more detailed and precise analysis of musical data.

• Marina Sudo, Michelle Ziegler, Miriam Akkermann & Olivier Lartillot (2025). Towards Collaborative Analysis: Kaija Saariaho’s Io (1986–87). Fulltekst i vitenarkiv
• Marina Sudo & Olivier Lartillot (2025). Contemporary Music Analysis and Auditory Memory: The Use of Computational Tools as an Aid for Listening. doi: https:/fabricadesites.fcsh.unl.pt/ncmm/ncmm-2025-program/. Fulltekst i vitenarkiv Vis sammendrag

  Music analysis involves categorising and interpreting sonic elements to uncover the structure and meaning of a work. In contemporary music studies, analysts often face methodological challenges in this process, especially when dealing with works that contain high degrees of complexity and ambiguity in terms of timbre, texture and temporal structure. This paper proposes a methodological model for analysing spatiotemporal complexities commonly observed in contemporary repertoires, utilising computational tools to enhance auditory memory and expand interpretative possibilities. Auditory memory plays a pivotal role in aural analysis, an approach that serves as a valuable alternative or complement to traditional score-based analysis. Rooted in Pierre Schaeffer’s typomorphology of objets sonores and the work of other analysts in electroacoustic music studies, the general principles of aural analysis can be outlined in a three-step process: 1) attentive listening to the acoustic properties of sounds, 2) describing and categorising their sonic variations, and 3) assessing their functions within a large-scale formal structure. Computational sound visualisation tools are frequently employed in this process to assist in transcribing and retaining musical events that are either absent from the score or difficult to interpret aurally due to textural complexities and/or timbral elusiveness. Despite their increasing use, however, the full potential of these tools remains largely unexplored in contemporary music studies. By digitally decomposing the transformation processes of ambiguous musical flows and supporting the organisation and structuring of auditory memory, computational analysis of audio data and various visualisation methods can deepen our understanding of both local sonic morphology and large-scale formal trajectory. In line with these considerations, the paper investigates how specialised computer interfaces can facilitate music analytical processes. Two research questions guide this investigation: 1) How can we analyse a stream of sonic textures; and 2) How can we outline the formal structure of a work that embraces extremes of sonic energy and polyrhythmic intricacy? To explore these questions, we have developed muScope, a new computer program that enables users to browse within high-resolution sonograms in tandem with a range of graphical representations capturing audio, timbral, rhythmic and structural descriptions. The analysis of spectral “fluctuations” allows for the identification of rapid pulsations at the middle ground between rhythm and timbre. Self-similarity matrix representations can serve as a tool for outlining the structural division of the audio data based on various sonic attributes. We integrate these visual representations into an analytical workflow designed to support the construction of a composition’s formal structure. Our methods are demonstrated through an analysis of excerpts from Kaija Saariaho’s Io for large ensemble and electronics (1986–87) and Raphaël Cendo’s Corps for piano and ensemble (2015). This integrated analytical approach offers new insights into the interplay between musical perception, memory and analytical interpretation using digital tools.

• Olivier Lartillot (2025). Computational Music Analysis Applied to Music Therapy Improvisation. doi: https:/ifas.thws.de/fileadmin/user_upload/250917_HIGH-M_Symposium_Programme_updated.pdf. Fulltekst i vitenarkiv
• Olivier Lartillot (2025). Computational Music Analysis: Toolbox and application to music psychology & therapy. Fulltekst i vitenarkiv
• Anna-Maria Christodoulou & Olivier Lartillot (2025). A Multimodal Dataset of Greek Folk Music. doi: https:/dlfm.web.ox.ac.uk/2025-programme. Fulltekst i vitenarkiv
• Lars Løberg Monstad (2025). Bandet har millioner av avspillinger på Spotify uten å eksistere: – Problematisk. [Internet]. NRK. Fulltekst i vitenarkiv Vis sammendrag

  Kunstig intelligens vil prege musikkproduksjon fremover, tror musikkbransjen. – Det føles meningsløst å lage musikk manuelt, sier musiker i Brenn.

• Olivier Lartillot (2024). Successes and challenges of computational approaches for audio and music analysis and for predicting music-evoked emotion. Fulltekst i vitenarkiv Vis sammendrag

  Background Decades of research in computational sound and music analysis has led to a large range of analysis tools offering rich and diverse description of music, although a large part of the subtlety of music remains out of reach. These descriptors are used to establish computational models predicting perceived or induced emotion directly from music. Although the models can predict a significant amount of variability of emotions experimentally measured (Panda et al., 2023), further progress seems hard to achieve, probably due to the subtlety of music and of the mechanisms underlying the evocation of emotion from music. Aims An extensive but synthetic panorama of computational research in sound and music analysis as well as emotion prediction from music is presented. Core challenges are highlighted and prospective ways forward are suggested. Main contribution For each separate music dimension (dynamics, timbre, rhythm, tonality and mode, motifs, phrasing, structure and form), a synthetic panorama of the state of the art is evoked, highlighting strengths and challenges as well as indicating how particular sound and music features have been found to correlate with rated emotions. The various strategies for modelling emotional reactions to audio and musical features are presented and discussed. One common general analytical approach carries out a broad and approximate analysis of the audio recording based on simple mathematical models, describing individual audio or musical characteristics numerically. It is suggested that such loose approach might tend to drift away from commonly understood musical processes and to generate artefacts. This vindicates a more traditional musicological approach based on a focus on the score or approximations of it – through automated transcription if necessary – and a reconstruction of the types of traditional representations commonly studied in musicology. I also argue for the need to closely reflect the way humans listen to and understand music, inspired by a cognitive perspective. Guided by these insights, I sketch the idea of a complex system made of interdependent modules, founded on sequential pattern inference and activation scores not based on statistical sampling. I also suggest perspectives for the improvement of computational prediction of emotions evoked by music. Discussion and conclusion Further improvements of computational music analysis methods, as well as emotion prediction, seem to call for a change of modelling paradigm. References R. Panda, R. Malheiro, R. Paiva, "Audio Features for Music Emotion Recognition: A Survey", IEEE Transactions on Affective Computing, 14-1, 68-88, 2023.

• Olivier Lartillot (2024). KI-verktøy for håndtering, transkribering og analyse av musikkarkiver. Fulltekst i vitenarkiv Vis sammendrag

  Jeg presenterer en rekke verktøy utviklet i samarbeid med Nasjonalbiblioteket. AudioSegmentor deler automatisk båndopptak i individuelle musikkstykker. Dette verktøyet forenklet digitaliseringen av Norsk folkemusikksamling. Vi bruker avanserte dyp læringsmetoder for å skape et banebrytende automatisk musikktranskriberingssystem, MusScribe, først finjustert for Hardingfele, og nå gjort tilgjengelig for musikkarkivprofesjonelle for et bredt spekter av musikk. Jeg diskuterer også våre pågående fremskritt innen den automatiserte musikologiske analysen av folkemusikkstykker og omfattende samlinger.

• Michelle Ziegler, Marina Sudo, Miriam Akkermann & Olivier Lartillot (2024). Towards Collaborative Analysis: Kaija Saariaho’s IO. Fulltekst i vitenarkiv
• Hans-Hinrich Thedens & Olivier Lartillot (2024). The Norwegian Catalogue of Folk Music Online. Fulltekst i vitenarkiv
• Lars Løberg Monstad & Olivier Lartillot (2024). muScribe: a new transcription service for music professionals. Fulltekst i vitenarkiv
• Mats Sigvard Johansson & Olivier Lartillot (2024). Automated transcription of Hardanger fiddle music: Tracking the beats. Fulltekst i vitenarkiv
• Lars Løberg Monstad & Olivier Lartillot (2024). Automated transcription of Hardanger fiddle music: Detecting the notes. Fulltekst i vitenarkiv
• Olivier Lartillot (2024). MIRAGE Closing Seminar: Digitisation and computer-aided music analysis of folk music. Fulltekst i vitenarkiv Vis sammendrag

  One aim of the MIRAGE project is to conceive new technologies allowing to better access, understand and appreciate music, with a particular focus on Norwegian folk music. This seminar presents what has been achieved during the four years of the project, leading in particular to the digital version of the Norwegian Catalogue of Folk Music. We are also conceiving tools to automatically transcribe audio recordings of folk music. More advanced musicological applications are discussed as well. To conclude, we introduce the new spinoff project, called muScribe, aimed at the development of transcription services, for a broad range of music, besides folk music, in a first stage tailored to professional organisations such as archives, publishers and producers.

• Olivier Lartillot (2024). Overview of the MIRAGE project. Fulltekst i vitenarkiv
• Olivier Lartillot (2024). Harmonizing Tradition with Technology: Enhancing Norwegian Folk Music through Computational Innovation. Fulltekst i vitenarkiv Vis sammendrag

  My work involves developing computational tools to safeguard and elevate the cultural significance of music repertoires, with a focus on a cooperative project with the National Library of Norway related to their collection of Norwegian folk music. Our first phase centered on transforming unstructured audio tapes into a systematic dataset of melodies while ensuring its access and longevity through efficient data management and linking with other catalogues. Our core activity involves transcribing audio recordings into scores, comparing the traditional manual method with our modern attempts towards automation. Providing detailed performance notation, the close alignment between scores and audio recordings will help improve comprehension and overall accessibility, as well as a more advanced structuring of the collection. Challenges arose when incorporating this music into the International Inventory of Musical Sources (RISM) database due to the incompatible 'incipit' concept, unfitting genres like Hardanger fiddle folk music. We suggest innovative generalisations for this concept. Moreover, we're creating techniques to digitally dissect the musical corpus, aiming to extract key features of each tune. This initiative not only serves as an alternative to incipits but also provides novel metadata formats, increasing the usability and connectivity within its content and with other databases.

• Lars Løberg Monstad (2023). Kunstig Intelligens i kunst og kultur. [TV]. NRK Dagsrevyen. Fulltekst i vitenarkiv
• Lars Løberg Monstad, Borgan Silje Larsen & Waske Vegard (2023). AI i musikken: konsekvenser og muligheter. Fulltekst i vitenarkiv
• Olivier Lartillot (2023). Towards a Comprehensive Modelling Framework for Computational Music Transcription/Analysis. Fulltekst i vitenarkiv Vis sammendrag

  Computational music analysis, still in its infancy, lacking overarching reliable tools, can be seen at the same time as a promising approach to fulfill core epistemo- logical needs. Analysis in the audio domain, although approaching music in its entirety, is doomed to superficiality if it does not fully embrace the underlying symbolic system, requiring a complete automated transcription and scaffolding of metrical, modal/harmonic, voicing and formal structures on top of the layers of elementary events (such as notes). Automated transcription enables to get over the polarity between sound and music notation, providing an interfacing semiotic system that combines the advantages of both domains, and surpassing the limitation of traditional approaches based on graphic representations. Deep learning and signal processing approaches for the discretisation of the continuous signal are compared and discussed. The multi-dimensional music transcription and analysis framework (where both tasks are actually deeply intertwined) requires to take into account the far-reaching interdependencies between dimensions, for instance between motivic and metrical analysis. We propose an attempt to build such a comprehensive framework, founded on general musical and cognitive principles and an attempt to build music analysis capabilities through a combina- tion of simple and general operators. The validity of the analyses is addressed in close discussion with music experts. The potential capability to produce valid analyses for a very large corpus of music would make such a complex system a potentially relevant blueprint for a cognitive modelling of music understanding. We try to address a large diversity of music cultures and their specific challenges: among others, maqam modes (with Mondher Ayari), Norwegian Hardanger fiddle rhythm (with Mats Johansson and Hans-Hinrich Thedens), djembe drumming from Mali (with Rainer Polak) or electroacoustic music (Towards a Toolbox des objets musicaux, with Rolf Inge Godøy). We aim at making the framework fully transparent, collaborative and open.

• Lars Alfred Løberg Monstad (2023). Demonstrasjon av Kunstig Intelligens som verktøy for komponister. Fulltekst i vitenarkiv
• Olivier Lartillot (2023). Computational audio and musical features extraction: from MIRtoolbox to the MiningSuite. Fulltekst i vitenarkiv
• Anna-Maria Christodoulou, Olivier Lartillot & Christina Anagnostopoulou (2023). Computational Analysis of Greek Folk Music of the Aegean. Fulltekst i vitenarkiv
• Lars Alfred Løberg Monstad, Peter Baden & Bernt Isak Grave Wærstad (2023). Kan kunstig intelligens brukes i låtskriverprosessen? Fulltekst i vitenarkiv
• Lars Alfred Løberg Monstad (2023). KI kan demokratisere musikkbransjen. Fulltekst i vitenarkiv
• Olivier Lartillot (2023). Dynamic Visualisation of Fugue Analysis, Demonstrated in a Live Concert by the Danish String Quartet. Fulltekst i vitenarkiv
• Olivier Lartillot (2023). Towards a comprehensive model for computational music transcription and analysis: a necessary dialog between machine learning and rule-based design? Fulltekst i vitenarkiv
• Olivier Lartillot & Lars Løberg Monstad (2023). MIRAGE - A Comprehensive AI-Based System for Advanced Music Analysis. Fulltekst i vitenarkiv
• Laura Bishop, Simon Høffding, Bruno Laeng & Olivier Lartillot (2023). Mental effort and expressive interaction in expert and student string quartet performance. Fulltekst i vitenarkiv
• Olivier Lartillot, Dana Swarbrick, Finn Upham & Carlos Eduardo Cancino-Chacón (2023). Video visualization of a string quartet performance of a Bach Fugue: Design and subjective evaluation. Fulltekst i vitenarkiv
• Olivier Lartillot (2023). MIRAGE Symposium #2: Music, emotions, analysis, therapy ... and computer. Fulltekst i vitenarkiv Vis sammendrag

  The 2nd MIRAGE Symposium covers a broad range of topics related to the MIRAGE project, mainly related to music and emotion, music cognition in general, music analysis and music therapy. Featuring two keynotes by Patrik Juslin and Didier Grandjean.

• Clemens Maidhof, Kat Agres, Jörg Fachner & Olivier Lartillot (2023). Intra- and inter-brain coupling during music therapy. Fulltekst i vitenarkiv
• Thomas Wosch, Bastian Vobig, Olivier Lartillot & Anna-Maria Christodoulou (2023). HIGH-M (Human Interaction assessment and Generative segmentation in Health and Music). Fulltekst i vitenarkiv
• Olivier Lartillot (2023). Music Therapy Toolbox, and prospects. Fulltekst i vitenarkiv
• Olivier Lartillot, Hans-Hinrich Thedens, Olav Luksengård Mjelva, Anders Elovsson, Lars Løberg Monstad & Mats Sigvard Johansson [Vis alle 8 forfattere av denne artikkelen] (2023). Norwegian Folk Music & Computational Analysis. Fulltekst i vitenarkiv Vis sammendrag

  As a prélude for Norway's Constitution Day, this special event celebrated the Norwegian folk music tradition, showcasing our new online archive and demonstrating the richness of Hardanger fiddle music, with live performance. One aim of the project is to conceive new technologies allowing to better access, understand and appreciate Norwegian folk music. In this event, we introduced a new online version of the Norwegian Folk Music Archive and discuss underlying theoretical and technical challenges. A live concert/workshop, with the participation of Olav Luksengård Mjelva, offered a lively introduction to Hardanger fiddle music and its elaborate rhythm. The interests and challenges of automated transcription and analysis were discussed, with the public release of our new software Annotemus. The symposium was organised in the context of the MIRAGE project (RITMO, in collaboration with the National Library of Norway's Digital Humanities Laboratory).

• Olivier Lartillot & Lars Løberg Monstad (2023). Computational music analysis: Significance, challenges, and our proposed approach. Fulltekst i vitenarkiv Vis sammendrag

  Music is something that we mostly all appreciate, yet it remains a hidden and enigmatic concept for many of us. Music notation, in the form of music scores, facilitates practicing and enhances the understanding of the richness of musical works. However, acquiring musical scores for any music performance is a tedious and demanding task (called music transcription) that demands considerable proficiency. Hence the interest of computational automation. But music is not just notes, it is also melody, rhythm, themes, timbre, and very subtle aspects such as form. While many of us may not be consciously familiar with these concepts, they still have a subconscious influence on our aesthetic experience. Interestingly, it often happens that the more we consciously understand the underlying language of music, the more we tend to appreciate and enjoy it. Therefore, there is value in creating computational tools that can automate and enhance these types of analyses. The presenters' past work resulted in the creation of Matlab's MIRtoolbox, which measures a broad range of musical characteristics directly from audio through signal processing techniques. Currently, the MIRAGE project prioritises music transcription (with a particular focus on Norwegian folk music), blending neural-network-based deep learning with conventional rule-based models. Through this project, they highlight the importance of acknowledging the interconnectedness between all musical elements. Additionally, they have crafted animated visualisations to make analyses more accessible to the general public and are aiming to make music transcription technology available to the public, with support from UiO Growth House.

• Lars Løberg Monstad & Olivier Lartillot (2023). Automatic Transcription Of Multi-Instrumental Songs: Integrating Demixing, Harmonic Dilated Convolution, And Joint Beat Tracking. Fulltekst i vitenarkiv Vis sammendrag

  In the rapidly expanding field of music information retrieval (MIR), automatic transcription remains one of the most sought-after capabilities, especially for songs that employ multiple instruments. Musscribe emerges as a state-of-the-art transcription tool that addresses this challenge by integrating three distinct methodologies: demixing, harmonic dilated convolution, and joint beat tracking. Demixing is employed to isolate individual instruments within a song by separating overlapping audio sources, thus ensuring each instrument is transcribed distinctly. Beat tracking is then run as a parallel process to extract the joint beat and downbeat estimations. These processes results in an output midi file, which is then quantized using information derived from the beat tracking. As such, this method paves the way for more accurate and sophisticated analyses, bridging the gap between human and machine understanding of music. Together, these methodologies allow us to produce transcriptions that are not only accurate but also highly representative of the original compositions. Preliminary tests and evaluations showcase the potential in transcribing complex musical pieces with high fidelity, outperforming many contemporary tools in the market. This innovative approach not only has implications for music transcription but also for broader applications in audio analysis, remixing, and digital music production. The model has been instrumental in accelerating the composition process for several Norwegian television shows. Moreover, its efficacy can be observed in the Netflix series "A Storm for Christmas." Renowned composer Peter Baden harnessed this tool to enhance his workflow, proving the demand for innovative tools like this in the professional music industry.

• Olivier Lartillot, Rolf Inge Godøy & Anna-Maria Christodoulou (2022). Computational detection and characterisation of sonic shapes: Towards a Toolbox des objets sonores. Fulltekst i vitenarkiv Vis sammendrag

  Computational detection and analysis of sound objects is of high importance both for musicology and sound design. Yet Music Information Retrieval technologies have so far been mostly focusing on transcription of music into notes in a classical sense whereas we are interested in detecting sound objects and their feature categories, as was suggested by Pierre Schaeffer’s typology and morphology of sound objects in 1966, reflecting basic sound-producing action types. We propose a signal-processing based approach for segmentation, based on a tracking of the salient characteristics over time, and dually Gestalt-based segmentation decisions based on changes. Tracking of pitched sound relies on partial tracking, whereas the analysis of noisy sound requires tracking of larger frequency bands possibly varying over time. The resulting sound objects are then described based on Schaeffer’s taxonomy and morphology, expressed first in the form of numerical descriptors, each related to one type of taxonomy (percussive/sustained/iterative, stable/moving pitch vs unclear pitch) or morphology (such as grain). This multidimensional feature representation is further divided into discrete categories related to the different classes of sounds. The typological and morphological categorisation is driven by the theoretical and experimental framework of the morphodynamical theory. We first experiment on isolated sounds from the Solfège des objets sonores—which features a large variety of sound sources—before considering more complex configurations featuring a succession of sound objects without silence or with simultaneous sound objects. Analytical results are visualised in the form of graphical representations, aimed both for musicology and music pedagogy purposes. This will be applied to the graphical descriptions of and browsing within large music catalogues. The application of the analytical descriptions to music creation is also investigated.

• Olivier Lartillot (2022). The MIRAGE project: Unlocking new computational abilities in computational music analysis. Fulltekst i vitenarkiv
• Olivier Lartillot (2022). Computational music analysis: Application to music & emotion. Fulltekst i vitenarkiv
• Olivier Lartillot, Anders Elovsson, Mats Sigvard Johansson, Hans-Hinrich Thedens & Lars Alfred Løberg Monstad (2022). Segmentation, Transcription, Analysis and Visualisation of the Norwegian Folk Music Archive. Fulltekst i vitenarkiv Vis sammendrag

  We present an ongoing project dedicated to the transmutation of a collection of field recordings of Norwegian folk music established in the 1960s into an easily accessible online catalogue augmented with advanced music technology and computer musicology tools. We focus in particular on a major highlight of this collection: Hardanger fiddle music. The studied corpus was available as a series of 600 tape recordings, each tape containing up to 2 hours of recordings, associated with metadata indicating approximate positions of pieces of music. We first need to retrieve the individual recording associated with each tune, through the combination of an automated pre-segmentation based on sound classification and audio analysis, and a subsequent manual verification and fine-tuning of the temporal positions, using a home-made user interface. Note detection is carried out by a deep learning method. To adapt the model to Hardanger fiddle music, musicians were asked to record themselves and annotate all played note, using a dedicated interface. Data augmentation techniques have been designed to accelerate the process, in particular using alignment of varied performances of same tunes. The transcription also requires the reconstruction of the metrical structure, which is particularly challenging in this style of music. We have also collected ground-truth data, and are conceiving a computational model. The next step consists in carrying out detailed music analysis of the transcriptions, in order to reveal in particular intertextuality within the corpus. A last direction of research is aimed at designing tools to visualise each tune and the whole catalogue, both for musicologists and general public.

• Anne Danielsen, Guilherme Schmidt Câmara, Olivier Lartillot, Sabine Liliana Leske & Connor Spiech (2022). Musical rhythm. Behavioural, computational and neurophysiological perspectives. Fulltekst i vitenarkiv
• Olivier Lartillot & Mats Sigvard Johansson (2021). Automated beat tracking of Norwegian Hardanger fiddle music. Fulltekst i vitenarkiv Vis sammendrag

  Norwegian Hardanger fiddle music is typically played by a solo fiddler, without rhythmic accompaniment except for the musician’s discreet foot stomping. Some of its repertoire features an asymmetrical ternary meter, with an uneven proportion of durations between the three beats of each bar, and with varying degrees of fluctuation of those proportions throughout each piece. In addition, there is often no clear audible onset corresponding to the beat position. As a result, many listeners find it difficult to hear the beats without experience from playing or dancing, and the beat onsets cannot be properly tracked by state-of-the-art beat trackers. The aim of this study is to develop a computational model of beat tracking of Hardanger fiddle music. Due to the rhythmic irregularity of the music, computational approaches relying on the detection of regular periodicities cannot be used. The proposed strategy adopts a cognitive perspective, modeling processes that progressively infer beats while scanning the music sequence chronologically. To each successive note is associated a tentative metrical position, which is determined based on a set of rules, using various input data such as (1) the ratio of the inter-onset interval (IOI) from the previous beat onset to the current note onset and the preceding inter-beat-onset interval and (2) the ratio of the IOI from the bar onset to the current note onset and the preceding inter-bar-onset interval. Successive repetition of eighth notes (as well as of eighth-note triplets) induce specific states that also guide the subsequent extension of the sequence. Multiple beat tracking scenarios can coexist at particular moments in the tune for very short periods. In particular, the very first notes at the beginning of the tune may initially imply conflicting metrical structures and tempi. The conflicting parallel beat tracking scenarios are progressively extended note after note in parallel. A scenario ends whenever it reaches a dead-end situation where the music is in total contradiction. Multiple scenarios are fused when they are continued exactly the same way, and only the scenario deemed the most congruent is retained. One particularity of Hardanger fiddle music is that beat onsets are not precise points in time but rather diffuse temporal extension, closely related to the notion of beat bin (Danielsen, 2010). Sometimes, multiple successive notes can all be considered as possible onsets for a given beat (Johansson, 2010; Stover et al., 2021). This multiplicity of beat onsets has been integrated into the model. Most of the analysis can be carried out using solely note onset time as input data, although more challenging cases occasionally require taking into account note duration or higher structure such as motivic repetition. This indicates that a proper beat tracker needs to be integrated as a module within a comprehensive music analysis framework, with bidirectional dependencies with the other modules of the framework. The model has so far been tuned and tested on a couple of tunes only. Its application to the automated analysis of a larger corpus is under investigation. Danielsen, Anne (2010). “Here, there, and everywhere. Three accounts of pulse in D'Angelo's 'Left and Right’.” In A. Danielsen (Ed.), Musical Rhythm in the Age of Digital Reproduction. Farnham: Ashgate/Routledge, UK. Johansson, Mats (2010). “The Concept of Rhythmic Tolerance – Examining Flexible Grooves in Scandinavian Folk-fiddling.” In A. Danielsen (Ed.), Musical Rhythm in the Age of Digital Reproduction. Farnham: Ashgate/Routledge, UK. Stover, Chris; Danielsen, Anne & Johansson, Mats (2021). “Bins, Spans, Tolerance: Three Theories of Microtiming Behavior.” [under review in Music Theory Spectrum].

• Anne Danielsen (2021). Opening remarks, presentation of RITMO. Fulltekst i vitenarkiv
• Olivier Lartillot & Mari Lilleslåtten (2021). Olivier Lartillot utvikler verktøy for å forstå musikk bedre. [Internet]. Det humanistiske fakultet UiO YouTube account. Fulltekst i vitenarkiv Vis sammendrag

  Kunstig intelligens kan hjelpe deg å forstå musikk bedre. UiO-forsker Olivier Lartillot jobber for at ny teknologi kan åpne folks ører for ny musikk.

• Olivier Lartillot & Mari Lilleslåtten (2021). Artificial intelligence can help you understand music better. [Internet]. RITMO News. Fulltekst i vitenarkiv Vis sammendrag

  Algorithms and technology have so far helped listeners to more of the same music. Now, UiO researchers are working on new technology that can get people interested in a greater musical variety.

• Anders Elovsson & Olivier Lartillot (2021). A Hardanger Fiddle Dataset with Performances Spanning Emotional Expressions and Annotations Aligned using Image Registration. Fulltekst i vitenarkiv Vis sammendrag

  This paper presents a Hardanger fiddle dataset “HF1” with polyphonic performances spanning five different emotional expressions: normal, angry, sad, happy, and tender. The performances thus cover the four quadrants of the activity/valence-space. The onsets and offsets, together with an associated pitch, were human-annotated for each note in each performance by the fiddle players themselves. First, they annotated the normal version. These annotations were then transferred to the expressive performances using music alignment and finally human-verified. Two separate music alignment methods based on image registration were developed for this purpose; a B-spline implementation that produces a continuous temporal transformation curve and a Demons algorithm that produces displacement matrices for time and pitch that also account for local timing variations across the pitch range. Both methods start from an “Onsetgram” of onset salience across pitch and time and perform the alignment task accurately. Various settings of the Demons algorithm were further evaluated in an ablation study. The final dataset is around 43 minutes long and consists of 19 734 notes of Hardanger fiddle music, recorded in stereo. The dataset and source code are available online. The dataset will be used in MIR research for tasks involving polyphonic transcription, score alignment, beat tracking, downbeat tracking, tempo estimation, and classification of emotional expressions.

• Olivier Lartillot & Stéphanie Weisser (2021). Roughness, Crackliness, Buzzingness, ...: Characterizations of Sonic Unsteadiness and Application to the Analysis of Traditional Music from Ethiopia, Kenya, Morocco and India. Fulltekst i vitenarkiv
• Aleksander Tidemann & Olivier Lartillot (2021). Interactive tools for exploring performance patterns in hardanger fiddle music. Fulltekst i vitenarkiv
• Anders Elovsson (2021). Polyphonic transcription and generation of annotated datasets using score alignment. Fulltekst i vitenarkiv
• Mari Romarheim Haugen (2021). Asymmetrical Meter and Periodic Body Motion in Norwegian Telespringar Performance. Fulltekst i vitenarkiv
• Olivier Lartillot, Erling Eliseus Guldbrandsen & Carlos Eduardo Cancino-Chacón (2021). Dynamics analysis, and application to a comparative study of Bruckner performances. Fulltekst i vitenarkiv
• Olivier Lartillot (2021). Presentation of MIRAGE project. Fulltekst i vitenarkiv
• Mats Sigvard Johansson (2021). Representing meter in traditional fiddle music: Accounting for variability and ambiguities. Fulltekst i vitenarkiv
• Olivier Lartillot & Mats Sigvard Johansson (2021). Tracking beats in Hardanger fiddle tunes. Fulltekst i vitenarkiv
• Olivier Lartillot, Anders Elovsson & Olav Luksengård Mjelva (2021). A new software for computer-assisted annotation of music recordings, with a focus on transcription. Fulltekst i vitenarkiv
• Hans-Hinrich Thedens (2021). Archiving representations of a folk music tradition in sound and notation. Fulltekst i vitenarkiv
• Rolf Inge Godøy & Olivier Lartillot (2021). Acoustic substrates of musique concrète features: Towards a Toolbox de l'objet musical? Fulltekst i vitenarkiv
• Aleksander Tidemann (2021). Exploring Hardanger fiddle performance patterns through interactive tools. Fulltekst i vitenarkiv
• Aleksander Tidemann, Olivier Lartillot & Mats Sigvard Johansson (2021). Towards New Analysis And Visualization Software For Studying Performance Patterns in Hardanger Fiddle Music. Fulltekst i vitenarkiv Vis sammendrag

  Analyzing musical performances is a challenging and emergent field of computational music research, aiming to reveal performance patterns and link them to musical contexts. There exists a modest amount of computational research on Hardanger fiddle performances. The MIRAGE research project is currently contributing to this scientific body, developing advanced MIR frameworks that build on recent musicological research. This paper presents the development and evaluation of two Max/MSP/Jitter software applications for music analysis and data visualization that integrate contemporary research perspectives on the complex rhythmical structuring of springar performances, investigating how we can design user-friendly computational tools that explore performance patterns in Hardanger fiddle music, in collaboration with MIRAGE. Based on a small questionnaire and a few operational tests, the study shows an interest in more effective software tools capable of revealing complex interrelations between musical dimensions in Hardanger fiddle performances. Additionally, the study highlights design considerations for tools aiming to increase the availability of computational music research in the field of musicology, such as cross-compatibility and integrated features that actively facilitate nuanced interpretation processes.

• Joachim Dalgard, Olivier Lartillot, Jonna Katariina Vuoskoski & Erling Eliseus Guldbrandsen (2021). Absorption - Somewhere between the heart and the brain. Fulltekst i vitenarkiv
• Olivier Lartillot & Petri Toiviainen (2020). Read about the Matlab MIRtoolbox. [Journal]. Young Acousticians Network (YAN) Newsletter. Fulltekst i vitenarkiv Vis sammendrag

  MIRtoolbox is a Matlab toolbox dedicated to the analysis of music and sound from audio recordings and to the extraction of musical features such as tonality, rhythm, or structures. It has also been used for non- musical applications, such as in Non Destructive Testing, and with non-audio signals. In this issue of the newsletter, the YAN discusses the MIRtoolbox with Olivier Lartillot (RITMO Centre for Interdisciplinary Studies in Rhythm, Time and Motion, University of Oslo, Norway) and Petri Toiviainen (University of Jyväskylä, Finland) You can also check out the MIRtoolbox website at: shorturl.at/oA038

• Fred Bruford & Olivier Lartillot (2020). Multidimensional similarity modelling of complex drum loops using the GrooveToolbox. Fulltekst i vitenarkiv Vis sammendrag

  The GrooveToolbox is a new Python toolbox implementing various algorithms, new and pre-existing, for the analysis and comparison of symbolic drum loops, including rhythm features, similarity metrics and microtiming features. As part of the GrooveToolbox we introduce two new metrics of rhythm similarity and four features for describing the significant properties of microtiming deviations in drum loops. Based on a two-part perceptual evaluation, we show these four new microtiming features can each correlate to similarity perception, and be used with rhythm similarity metrics to improve personalized similarity models for drum loops. A new measure of structural rhythmic similarity is also shown to correlate more strongly to similarity perception of drum loops than the more com- monly used Hamming distance. These results point to the potential application of the GrooveToolbox and its new features in drum loop analysis for intelligent music production tools. The GrooveToolbox may be found at: https://github.com/fredbru/GrooveToolbox

• Olivier Lartillot & Fred Bruford (2020). Bistate reduction and comparison of drum patterns. Fulltekst i vitenarkiv Vis sammendrag

  This paper develops the hypothesis that symbolic drum patterns can be represented in a reduced form as a sim- ple oscillation between two states, a Low state (commonly associated with kick drum events) and a High state (often associated with either snare drum or high hat). Both an onset time and an accent time is associated to each state. The systematic inference of the reduced form is formal- ized. This enables the specification of a rhythmic struc- tural similarity measure on drum patterns, where reduced patterns are compared through alignment. The two-state representation allows a low computational cost alignment, once the complex topological formalization is fully taken into account. A comparison with the Hamming distance, as well as similarity ratings collected from listeners on a drum loop dataset, indicates that the bistate reduction enables to convey subtle aspects that goes beyond surface-level com- parison of rhythmic textures.

• Olivier Lartillot, Carlos Cancino-Chacón & Charles Brazier (2020). Real-Time Visualisation Of Fugue Played By A String Quartet. Fulltekst i vitenarkiv Vis sammendrag

  We present a new system for real-time visualisation of music performance, focused for the moment on a fugue played by a string quartet. The basic principle is to offer a visual guide to better understand music using strategies that should be as engaging, accessible and effective as possible. The pitch curves related to the separate voices are drawn on a space whose temporal axis is normalised with respect to metrical positions, and aligned vertically with respect to their thematic and motivic classification. Aspects related to tonality are represented as well. We describe the underlying technologies we have developed and the technical setting. In particular, the rhythmical and structural representation of the piece relies on real-time polyphonic audio-to-score alignment using online dynamic time warping. The visualisation will be presented at a concert of the Danish String Quartet, performing the last piece of The Art of Fugue by Johann Sebastian Bach.

• Olivier Lartillot & Marina Sudo (2025). AcousMuScope: Users' Guide. Universitetet i Oslo. doi: https:/www.uio.no/ritmo/english/projects/mirage/software/AcousMuScope/index.html. Fulltekst i vitenarkiv Vis sammendrag

  AcousMuScope is a new software for music analysis of audio recordings, focusing on the graphical interface to browse into the analyses.

• Grzegorz Joachimiak, Rebekah Ahrendt & Olivier Lartillot (2024). Endangered Musical Sources: Strategies for Safeguarding, Digitization, and International Collaboration. Report of Working Group 2 SOURCES, Wrocław, 22–24 May 2024. Zenodo. Fulltekst i vitenarkiv
• Anna-Maria Christodoulou, Christina Anagnostopoulou & Olivier Lartillot (2022). Computational Analysis of Greek folk music of the Aegean islands. National and Kapodistrian University of Athens. Fulltekst i vitenarkiv

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