A mode filter is where you see which notes occur the most and discard the rest. e.g. if you were to do a simple mode filter and discard anything with a value less than 20 then you would get 54x G, 52x F#, 28x D#, 33x D# However you would...

signal-processing,fft,pitch-tracking,pitch-detection

For Cepstrum i always have used to this steps: Apply hamming windows in the signal (1024 or 2048 points) Apply FFT Get magnitude use just the first half values Convert to log scale Apply IFFT Find the Peak The equation for cepstrum: IFFT(log(abs(FFT(s)))) Maybe are you are seeing reflected because...