© 2018 CEUR-WS. All rights reserved. With the increasing importance attributed to intangible cultural heritage, of which music performance is an important part, public archive collections contain a growing proportion of audio and video material. Currently used models have only limited capabilities for their representation. This demo illustrates our proposal for a unified ontological model of live music recordings and associated tangible artefacts with a Web application for the exploration of live music events of the Grateful Dead

International Semantic Web Conference

Sandler, MB

Thalmann, F

Wilmering, T

Information Technology and Nanotechnology

English

Queen Mary Research Online

Exploration of Grateful Dead Concerts andMemorabilia on the Semantic WebThomas Wilmering, Florian Thalmann, and Mark B. SandlerCentre for Digital Music (C4DM), School of Computer Science and ElectronicEngineering, Queen Mary University of London, London, UK{t.wilmering, f.thalmann, mark.sandler}@qmul.ac.ukAbstract. With the increasing importance attributed to intangible cul-tural heritage, of which music performance is an important part, publicarchive collections contain a growing proportion of audio and video ma-terial. Currently used models have only limited capabilities for their rep-resentation. This demo illustrates our proposal for a unified ontologicalmodel of live music recordings and associated tangible artefacts with aWeb application for the exploration of live music events of the GratefulDead.Keywords: live music · cultural heritage · multimedia · Grateful Dead.1 OverviewWith the ubiquitous and immediate availability of recorded music on stream-ing services and internet platforms, live music events are becoming increasinglycentral to the music world, due to the unique and physical musical experiencedelivered to the audience [7]. For many decades, music fans have been doc-umenting such events and accumulating artefacts and memorabilia, many ofwhich are now being transferred to public archives and often digitised [3]. Theuse of Semantic Web technologies presents an opportunity for linking the nu-merous archives online. However, commonly used conceptual models for thispurpose lack a consistent representation of sound and multimedia objects [4, 5].In [8] we propose a data model for a unified representation of cultural artefactsof time-based and non-time-based nature, which allows their alignment along ahierarchy of timelines. This demo introduces a web application1 based on thismodel for the exploration of Grateful Dead concerts through digitised artefactsand audio recordings. A particular focus is placed on semantic audio analysisand thus enabled functionality.2 Data ModelThe Web application is based on an application-based ontological model thatconceptualises different types of live music events and their relationships based1 https://grateful-dead-live.github.io (in development)CapturingArtifactExpressionAudioSignalArtifactItemEventPhotoEventDigitalImageassociated_withdigital_imageCapturingEventproducedVideoSignalTimelineIntervaltimelineIntervaltimetimeline itemEvent OntologyMusic OntologyTimeline OntologyLive Music Event VocabularyArtifactManifestationmanifestationproperty relationsubclass relationURLurlPromotionArtifact FanmadeArtifactArtifactExpressionInstanttimetimelinetimedocumentssubproperty relationtimesub_eventDigitalArtifactItem PhysicalArtifactItemurlFig. 1: Data model for associating artefacts with the live music event and itstimeline with examples of artefact expressions.on the Event Ontology2 and live-music related artefacts including musical andnon-musical ones. We relate artefacts with events at any scale, e.g. tours, fes-tivals, or concerts, and place them in a hierarchy of timelines associated withthe events, using the timeline ontology3. The ontology allows connecting anyevent to Music Ontology4 concepts such as artists, groups, compositions, etc.An overview of the data model for artefacts is given in Figure 1. In [8] we pro-pose mappings to concepts of the Music Ontology and FRBRoo5, facilitatingthe mediation and interchange of music-related, bibliographic and museum in-formation, based on the Group 1 entities of the Functional Requirements forBibliographic Records (FRBR) entity-relationship model [6].3 Web ApplicationThe Web application focuses on live concerts of the band Grateful Dead. Theband’s history continues to garner interest by both fans and scholars, both withrespect to their music and their cultural impact [2]. The application combinesinformation collected from existing Web resources combined with automatic se-mantic analysis of audio content to infer higher-level musical information, allow-ing users to explore the band’s concert history with an audiovisual experience.Knowledge Acquisition and Architecture The Grateful Dead collection ofthe Live Music Archive (LMA)6 consists, at the time of writing, of more than12,000 concert recordings recorded on over 2,000 dates spanning the years 1965to 1995. The audio material is accompanied by basic unstructured metadatacovering information such as dates, venues, set lists and recording lineage. Therecordings are digital transfers of fan-made audience recordings encouraged by2 http://motools.sourceforge.net/event/event.html3 http://motools.sourceforge.net/timeline/timeline.html4 http://musicontology.com/5 https://www.ifla.org/publications/node/112406 https://archive.org/details/GratefulDeadFig. 2: GUI of the Web application.audio feature extractorstriple storeRDF generation Web audio playerWeb resourcesWeb parseretree triple storeWebapplicationAPIdata flowqueryaudio dataCALMA dataFig. 3: System architecture of the Webapplication.the band for non-commercial use, and recordings taken from the audio engineers’mixing desks. The application combines audio recordings with data from severalSemantic Web resources, including Live Music Archive Linked Data7 and DB-pedia8, for information about venues, cities, artists, etc. Data taken from otherWeb resources related to Grateful Dead concerts includes scans of artefacts suchas tickets and posters, and setlist and lineup details. Data from these sites hasbeen aggregated using dedicated scripts which parse information and automati-cally generate RDF data. Audio feature extraction results are accessible via linksto the Computational Analysis of the Live Music Archive (CALMA) dataset [1].These features are for instance used for constructing a reference timeline for thealignment of different recordings of a given concert, which the archive providesas separate files with inconsistent segment boundaries and completeness, sourcedfrom tape recordings of varying speeds. Figure 3 illustrates the system architec-ture and a high-level representation of the linking process. The Web applicationuses its own API acccepting SPARQL queries, as well as a Web Audio playerwhich recombines and streams audio from the LMA.Functionality and Frontend Figure 2 shows a screenshot of the prototypewith a view of a particular concert, which juxtaposes the information, artefacts,and recordings available for that particular date. Users can listen to the record-ings, read about the venue, location, setlist, the musicians, etc, and find imagesand historical weather data. Via links at each of the concepts and the timelineof the band’s career, related concerts can be reached and explored. For example,users can find any concert where a particular song was played directly throughsuch links. Additionally, a search function allows users to find more specific in-formation which is then compiled and visually presented. Enabled by the audio7 http://etree.linkedmusic.org/about/8 https://wiki.dbpedia.org/features stored in the graph, users will also be able to look for similar versionsof songs, compare aligned different recordings of the same concert, as well ascreate playlists and audible collages based on particular search results.Further Development Future work includes the evaluation of the applicationwith a user-study conducted in collaboration with the Internet Archive9. Thestudy will consist of automated analysis of user-behaviour, as well as surveys forthe assessment of aspects of the user experience. We are currently working onimproving the functionality based on audio features extracted from live musicrecordings, as well as exploring new possibilities of interacting with the audioarchive, continuing the work discussed in [9], implementing immersive audioapplications using different recordings of a given concert. Further work on thedata model will lead to an extension to the Music Ontology covering live musicevents and associated artefacts.Acknowledegments This paper is supported by EPSRC Grant EP/L019981/1,Fusing Audio and Semantic Technologies for Intelligent Music Production andConsumption. Mark B. Sandler acknowledges the support of the Royal Societyas a recipient of a Wolfson Research Merit Award.References1. Bechhofer, S., Page, K., Weigl, D., Fazekas, G., Wilmering, T.: Linked data publi-cation of live music archives and analyses. 16th International Semantic Web Con-ference (ISWC) 2017 (2017)2. Benson, M.: Why the Grateful Dead Matter. ForeEdge Press (2016)3. Collins, J.: Doing-it-together: Public history-making and activist archiving in onlinepopular music community archives. In: Preserving Popular Music Heritage, pp. 91–104. Routledge (2015)4. ICOM/CIDOC: Definition of the CIDOC conceptual reference model ver-sion 6.2.2. Online: http://www.cidoc-crm.org/sites/default/files/2017-09-30%23CIDOC%20CRM v6.2.2 esIP.pdf (2017)5. International Federation of Library Associates and Institutions: Definition of FR-BRoo: A conceptual model for bibliographic information in object-oriented formal-ism. Online: https://www.ifla.org/files/assets/cataloguing/FRBRoo/frbroo v 2.4.pdf (2015)6. International Federation of Library Associations and Institutions : Functional re-quirements for bibliographic records – final report. Online: https://www.ifla.org/files/assets/cataloguing/frbr/frbr 2008.pdf (2009)7. Kjus, Y.: Live and Recorded: Music Experience in the Digital Millennium. Springer(2018)8. Thalmann, F., Wilmering, T., Sandler, M.B.: Cultural heritage documentation andexploration of live music events with linked data. Workshop on Semantic Applica-tions for Audio and Music (SAAM 2018), Monterey, California USA (2018)9. Wilmering, T., Thalmann, F., Sandler, M.B.: Grateful live: Mixing multiple record-ings of a Dead performance into an immersive experience. In: Proceedings of theAudio Engineering Society Convention 141 (2016)9 https://archive.org/

Exploration of grateful dead concerts and memorabilia on the semantic Web

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Exploration of grateful dead concerts and memorabilia on the semantic Web

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