Online score‐informed source separation in polyphonic mixtures using instrument spectral patterns
Antonio J. Muñoz-Montoro, Pedro Vera-Candeas, R. Cortina, Elías F. Combarro, Pedro Alonso · Computational and Mathematical Methods · 2019
Soundprism is a real-time algorithm to separate polyphonic music audio into source signals, given the musical score of the audio in advance.This paper presents a framework for a Soundprism implementation.A study of the sound quality of the online score-informed source separation is shown, although a real-time implementation is not carried out.The system is compound of two stages: 1) a score follower that matches a MIDI score position to each time frame of the musical performance; 2) a source separator based on a Non-negative Matrix Factorization (NMF) approach guided by the score.Real audio mixtures composed of an instrumental quartets were employed to obtain preliminary results of the proposed system.