Rotnot tries to figure out the notes of sound samples based on their filename, and save that note as meta data in the file.
At the moment it works on a bunch of multi sampled instruments I had available, where the filename were either:
- Note+octave (a#4.wav)
- Collection_name-note+octave (MutedTrumpet-Bb2.wav); or
- The actual midi note (031.wav)
The midi note is then written back to the wave file as part of the "Sampler Chunk", in the MIDI Unity Note field.
(TODO: The "Instrument Chunk" har a field with similar purpose, MIDI Unshifted Note. Consider writing to that as well.)
I own a 1010music blackbox hardware sampler. It can load a folder of samples as a multi-sample instrument, but it doesn’t use filenames for note recognition. So I use this to prepare sample packs before moving them to the SD card.