01
Choose your instrument.
Start with a basic accordion setup, then modify the piano range and bass board to fit your instrument.
Free MIDI practice, made for accordion
Find your flow.
Both hands.
Bring your favorite MIDI into focus. Follow the piano, find your bass buttons, and build the rhythm one phrase at a time.
Free to practice. Free to share. No subscriptions.
THE PRACTICE ROOM≋
Your next songIllustrative practice preview90 BPM
LEFT HAND6 × 12
RIGHT HANDG2–E5
75%↻
Two hands. One clear view.Built around your accordion.
↥Bring your own MIDI
≋Match your accordion layout
↻Practice at your own pace
01 / Your instrument
Start with your accordion.
Pick a starting layout, then change it to match your instrument. Your setup follows you into the player.
Modify this setup G2–E5 · 6 × 12
More controls for directions, reference highlights, sound, and labels are in the practice room.
Your original setup is ready.
02 / Pick your MIDI
Find a tune. Share a tune.
Browse community posts, or open a file privately. Posting a MIDI makes it public for everyone to view and download.
Have a file already? Open it privately—your MIDI stays in this browser.
Loading the MIDI library…
Less setup. More playing.
Your next practice, in three steps.
02
Pick a MIDI.
Open a MIDI privately or choose a community post from the library. Share one of your own whenever you like.
03
Find your rhythm.
Slow the playback, listen to one hand, and loop a difficult phrase. Bring both hands together when you’re ready.
Before you play
A few helpful notes.
What kind of MIDI files can I use?
Bellowkeys reads Standard MIDI Format 0 and Format 1 files with the .mid or .midi extension. Separate melody, bass, and chord tracks make it easier to map the hands. For a combined piano track, choose a split point.
How does the Stradella display find chords?
It looks at notes played together and matches common major, minor, seventh, and diminished chords to buttons. Block-chord accompaniment works best. Complex voicings and free-bass lines can need interpretation.
Will Bellowkeys remember my instrument?
Yes. Save your instrument setup and Bellowkeys remembers it on this browser. Privately opened files stay on your device; only MIDI files you explicitly post are shared with the community.
Your accordion. Your next song.
Choose your instrument, pick a MIDI, and play. Always free to use.
Let’s practice ↗