2007:Multiple Fundamental Frequency Estimation & Tracking
A complex music signal can be represented by the F0`s contours of its constituent sources which is very useful in most music information retrieval systems. There have been many attempts in multi-F0 estimation, and related area melody extraction. The goal of multiple F0 tracking is to extract contours of each source from a complex music signal. In this task we would like to evaluate the state-of-art multi-F0 tracking algorithms. Since F0 tracking of all sources in a complex audio mixture can be very hard, we have to restrict our problem space. The possible cases are:
1. Multiple instruments active at the same time but each playing monophonically (one note at a time) and each instrument having a different timbre in a single channel input.
2. Multiple sources playing polyphonically (e.g. chordsΓÇª) in a single channel input.
3. Multiple sources playing polyphonically in a stereo panned mixture.
We are more interested in the more general but feasible first case. The third case, which is subset of first case should be considered as a subtask since in most professional recordings, sources are recorded individually and panned across two stereo channels, researchers should take advantage of that.