Dear Roisin Loughran,|
We did some works on that topic recently,
the goal was to estimate the pitch note rather than the exact pitch frequency but across a wide range of instruments and octaves.
The best method was a simple combination (multiplication) of
1) an Auto-correlation of a DFT with
2) a Frequency-mapped cepstrum (cepstrum lags expressed as inverse frequencies).
You can find details about our algorithm in the last ICASSP proceedings
Music Pitch Representation by Periodicity measures based on Combined Temporal and Spectral Representations
IEEE ICASSP 2006 Toulouse (France)
Ircam - R&D
Roisin Loughran a écrit :