Camp 2011 - Version 1.4

Chaos Communication Camp 2011
Project Flow Control

Werner Van Belle
Day Day 2 - 2011-08-11
Room Kourou
Start time 22:30
Duration 01:00
ID 4402
Event type Lecture
Track Science
Language used for presentation English

Tempo/Rhythm/Echo extraction from Music

This talk explains how the tempo of music can accurately be measured and how it can be used afterwards to extract rhythmical information and composition properties. These can further be used to find similar songs, generate synthetic rhythms and mix music.

The peaks/valleys in autodifference/autocorrelation plots correspond potentially to the perceived tempo of music. Consequently, they can be used to measure the tempo of music. The problem with these techniques is that reported tempos might be off by a multiplication factor. This presentation discusses removal of such biases as to flatten out the autodifference/autocorrelation plots. Secondly, we discuss how the problem of tempo-harmonics (120 BPM reported as 90 BPM for instance) can be reduced from a multi-class classification problem to a binary classification problem. The resulting tempo information makes it further possible to extract rhythm and composition extraction from music.