AudioForges audio to MIDI test clips (Nov 2026)

Each clip was written note by note, then rendered with the FluidR3 GM soundfont.
The _true_notes.mid file is the answer key.
Scoring: pitch must match and the note must start within 50 ms (mir_eval, offset_ratio=None).
Full method: https://audioforges.com/audio-to-midi-accuracy
