Stem to MIDI

Session log

Everything the app did: playback attempts with the truth probe, drum analysis, exports, errors. If something misbehaves, download the log and attach it in chat.

Drop Suno drum stems here

This app is drums only. Name the file with drums in it (for example 2 Drums.wav) so it tags as drums. Any other stem gets a drums-only notice and is not transcribed.

Everything runs on this device. Audio never uploads.

Add a drum stem to begin. Every note stays editable in the piano roll: drag sideways for timing, up or down to change the drum piece.

Export

The ZIP holds full_song.mid (every drum stem in one Type 1 file at 960 PPQ), one single-track MIDI per stem named after the stem (for example 2 Drums.mid), groove_template.mid, song.groove.json with velocity and timing metadata, and FEEL.txt.

Include tempo and key in MIDI
On by default, for opening a file standalone in Logic. Turn it off when dragging files into an existing Logic session, so the files leave your session tempo untouched. This drums-only build writes no key meta either way.

Quantize strength for export only: 0%

Default is 0%. Your exact timing, the groove, stays untouched.

How to fix notes

Click a note in any piano roll to hear it and select it. Drag left or right to move its timing. Drag up or down to change pitch, or on the drum roll to change the drum piece. Press Delete, or use the delete button on the stem, to remove a selected note. Solo and mute work per stem for both the MIDI preview and the original audio.