AI backing track generator
Published November 2026
A backing track from a library is somebody else's song, in its key, at its tempo, over its changes. When the part is yours (a melody, a guitar riff, a vocal line, a MIDI file), what you want is a band that plays your changes. Doseedo's Accompany listens to the parts you give it, hears the key, the tempo and the chords, and writes new parts that play along: bass, drums, piano, electric guitar, violin or sax, each rendered as its own stem.
How it works
- Give it up to three parts. Audio or MIDI: a sung melody, a guitar take, a piano part, a MIDI file.
- Choose up to three players. Bass, drums, piano, electric guitar, violin, sax.
- It listens, then writes. The tune is transcribed and the harmony heard: the key, the tempo and the chord changes. Each new part is written to fit them and played by its instrument model.
- Check what it heard. The result shows the key, tempo and changes it worked from, so a wrong reading is visible before you use the take.
Arrangement dials steer how a part is written: how many voices, the rhythm, the playing technique. A different seed gives a different take on the same changes.
Your part, not a loop
A loop or a library track repeats a pattern that was written for a different song. These parts are written against yours, so when your song changes chord, they do too. Each comes back as its own stem, which means you can drop the drums, keep the bass, or mix the band under your take in your DAW.
To practise over a standard twelve-bar in A, a library track is fine. When the song is yours, start from the song.
From a mix?
Accompany works from the parts you give it. If what you have is a finished mix, take it apart first: the stem splitter gives you the vocal and the instruments as separate files, and audio to session turns the whole song into a Logic or Ableton project.
Get a band for your part
Drop up to three parts, pick the players, and hear them play along.
Open Accompany →FAQ
What is an AI backing track generator?
A tool that writes accompaniment for music you already have. Doseedo’s Accompany hears the key, tempo and chords of your parts and writes bass, drums, piano, guitar, violin or sax parts that play along, each as its own stem.
Can it play along with a vocal or a guitar recording?
Yes. Audio parts are transcribed and their harmony is heard before the new parts are written.
Can I give it a MIDI file?
Yes. A source part can be audio or MIDI, up to three of them.
Which instruments can play the backing?
Bass, drums, piano, electric guitar, violin and sax, up to three at a time.
Does it follow my chord changes?
It writes each part over the changes it hears in your parts, and shows the key, tempo and changes it read, so you can check them.
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