BpmDj Meta-Data Extraction

Werner Van Belle¹ - werner@yellowcouch.org, werner.van.belle@gmail.com

1- Personal Research; CH-9294 Basel, Switzerland

Abstract: The presentation covers all meta data extraction aspects in BpmDj. It starts with explaining different techniques to measure tempo (energy enveloppe spectra, autocorrelation, peak detectors, ray-shooting and realtime tempo extraction). Beatgraphs are introduced, spectrum measurement based on the psychoacoustic bark scale is covered as well as echo characteristic, rythm and composition extraction. SVD / PCA analysis is used to map a multidimensional spectrum space to 3 primary colors

Reference: Werner Van Belle; BpmDj Meta-Data Extraction; Presented at the Computer Science Department, University of Tromso; Norway; February 2005