Impact of Distance in Pitch Class Profile Computation
Giordano Ribeiro Eulalio Cabral, Jean-Pierre Briot, François Pachet · 2005
Abstract. Pitch Class Profiles (PCP) [Fujishima 1999] are largely used for all applications involving harmonic content. Although the main steps of the PCP calculation are generally equal over all the scientific literature, some implementation details may vary, specially the impact of the distance between the frequency of the FFT bins and their closest note. This paper compares 6 ways of using this distance to weight the contribution of each FFT bin in the final PCP vector. We present the results of the 6 computed PCPs when used in a chord recognizer, a tonality estimator and a key detector. 1.