On tempo tracking: Tempogram representation and Kalman filtering

Abstract

We formulate tempo tracking in a Bayesian framework where a tempo tracker is modeled as a stochastic dynamical system. The tempo is modeled as a hidden state variable of the system and is estimated from a MIDI performance by Kalman filtering and smoothing. We also introduce the Tempogram representation, a wavelet-like multiscale expansion of a real performance, on which the Kalman filter operates.