Universiteit ¡van ¡Amsterdam 17 ¡January ¡2013 Similarity ¡and ¡Segmenta.on ¡for ¡Electronic ¡ Dance ¡Music Bruno ¡Rocha Aline ¡Honingh Niels ¡Bogaards Victor ¡Bergen ¡Henegouwen
Goal Similar tempo Similar timbre Electronic Mobile Dance Music App (EDM) Similar rhythm ...
Methodology Seg B2 Music Timbre Rhythm Features Features Electronic Dance Music Distance User Collection Seg A1 Timbre Rhythm Song A Song B Features Features Seg A1 Seg A2 Seg A3 Seg B1 Seg B2 Distance Song N Seg A3 Timbre Rhythm Features Features
SimMixer iPad test app for timbre similarity • database contains 1295 EDM songs • segmented into 22745 segments • each segment is represented by 31 timbre descriptors • SimMixer is a tool to explore and validate the timbre similarity algorithms
Research Issues Segmentation • Detection of first downbeat • typical EDM structure starts with bass drum • critical step for the detection of the structure Figure 1: Detection of first downbeat
Research Issues Segmentation • Segment boundaries fine-tuning • segmentation algorithm detects timbre changes • segment boundaries in EDM are known to usually coincide with beats Figure 2: Segment boundaries fine-tuning B. Rocha, N. Bogaards, A. Honingh, “Unsupervised detection of structural changes in electronic dance music”, DMRN, UK, 2012
Development • Work method • develop a working algorithm • test feasibility • test usability • develop product(s) Matlab C++ iPad optimized Figure 3: Tool Chain
Lessons Learned • optimized implementation can only start after the algorithm is done (lost quite some time implementing sub-algorithms that in the end are not used) • important to establish ground truth / reference early on, but a problem is that it may not be clear what exactly needs to be researched / developed (for instance: problem of segmentation) • plan research sub-projects carefully, to allow implementation to start asap and increase involvement by industrial partner
Conclusion • University vs (small) Company • Science vs Commerce • Science - Company - Audience
Horizon • Intelligent mobile music tools
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