Question: how to use algorithms other than "yin" for demo_pitch.py

[jlearman]

I'm running demo_pitch.py on sample files that contain one piano note each, and the results for notes below C2 are wrong (even after adjusting win_s and hop_s to 1 second's worth of samples.)

I tried passing values other than "yin" to pitch(), but it fails for anything other than "yin" or "schmitt" (which fails to detect any pitches, though perhaps because I'm not downsampling to 44100 Hz, the samples happen to be 48000 Hz.)

I tried all the names I found in https://github.com/aubio/aubio/blob/master/src/pitch/pitch.h:

• default
• schmitt
• fcomb
• mcomb
• yin
• yinfast
• yinfft
  and all fail but yin and schmitt.

The failure is simply:

Traceback (most recent call last):
  File "/home/jlearman/git/jSfzTools/py3/demo_pitch.py", line 25, in <module>
    pitch_o = pitch(algo, win_s, hop_s, samplerate)
RuntimeError: failed creating pitch

How can I try other pitch detection methods?

Note: I'm not downsampling because that fails also, without much explanation other than "downsampling fails."