Ontological description of Indian art music for knowledge-driven exploration of audio music collections Gopala Krishna Koduri, Xavier Serra {gopala.koduri, xavier.serra}@upf.edu Audio Database Audio Features Editorial Information Semantic Information Music Scores Application Programming Interface (API) Client Web Server Linked Data Linking Open Data Presentation Layer Web/Mobile Browser Data Sources Processing Layer Data Processing Audio mid- and high-level descriptors Semantic descriptors Information Processing Ontology Definition Data Linking Similarity measures Analysis of melodic and rhythmic aspects of music taking advantage of the domain knowledge obtained from musicological texts and from experts: http://compmusic.upf.edu/node/4 Knowledge-based similarity measures to navigate and explore the music collections using musically aware connections between entities [1]. System overview & goals Ontologies for concepts and relationships coming from music theory [2]. Audio music collections with metadata and contextual information as complete as possible, linked to other sources: http://musicbrainz.org/user/compmusic/collections Requirements Ontologies for Indian art music Raaga Progression Svara Sequence Gamaka hasSequence hasProgression hasSvara hasGamaka hasSvara isA isA OWLList isA hasRendition so:Segment tl:Interval isA Shadjama Rishaba Gandhara Madhyama Panchama Dhaivata Nishada Suddha Gandhara Sadharana Gandhara Antara Gandhara Chatussruti Rishaba ..... Suddha Rishaba isA isA isA isA isA isA isA isA isA isA isA precedes disjointWith disjointWith disjointWith isA Partial rāga ontology [2] Three important aspects which need intologies for a complete description of Indian art music: Rāga (melodic framework), Tāla (rhythmic framework) and Forms (compositional and improvisatory categories). Challenges relevant to most, if not all music traditions, such as melodic sequences, are modeled with appropriate semantics. Used in conjuction with audio data analyses with mutual benefit. Used in linking multiple sources of information. Used to directly compute the relatedness/similarity measures between musical entities. [1] Porter, A., Sordo, M., Serra, X.: Dunya: a system to browse audio music collections using cultural context. In: ISMIR. (2013) In press [2] Koduri, G. K., Serra, X.: A knowledge-based approach to computational analysis of melody in Indian art music, In: SMAM-ISWC. (2013) In press Example queries 1. Which svaras are the most distinguishing ones between Tōḍi and Śankarābharaṇaṁ?. 2. List out the differences between phraseology for Kaḷyāṇi rāga in compositions of Tyāgarāja and Dīkṣitar 3. Which rāgas are similar to Bahudāri?