Fiume Comp is an online backing track generator. You type a chord progression, choose a musical style, set the tempo, and play the result in the browser.

It is for instrumentalists who want a fast practice track for improvisation, ear training, solo ideas, and rehearsing chord changes without searching for a pre-made backing track.

Can I loop a short progression?

Yes. You can set the number of bars, start playback from a selected bar, and keep loop playback on while you practice.

Does it work like a full DAW?

No. It is intentionally faster and narrower than a DAW: type chords, choose a style, adjust the mixer, and practice over the accompaniment.

Online backing track generator

Build a backing track for the changes you want to practice

Type a chord progression, choose a style, set the tempo, and start playing over it. Fiume Comp is for guitarists, horn players, pianists, bassists, singers, and anyone who needs a custom practice track fast.

Create a backing track Read the FAQ

Free beta. Browser playback. Saved songs stay in your browser for now.

Bar 1Cm7Main A

Bar 2Fm7Main A

Bar 3Cm7Main A

Bar 4G7altFill

Bar 5Fm7Main B

Bar 6Bb7Main B

Bar 7Ebmaj7Main B

Bar 8G7Fill

Play II Stop Loop on

Your changes, not a generic track

Practice the progression, key, form, and tempo you actually need today.

Fast enough for a practice break

Sketch chords and start playing before the idea cools off.

Loop short forms cleanly

Use 4, 8, 12, or 16 bars and stay on one section until it feels natural.

Shape the band

Adjust track volumes and sounds from the mixer while the browser plays.

Practice use cases

Useful when YouTube does not have the exact track

A pre-made backing track is fine until the key, progression, tempo, or form is wrong. Fiume Comp makes the track follow the exercise.

Improvise over chord changes

Build ii-V-I lines, blues forms, modal vamps, rhythm changes fragments, or a tough bridge without leaving the browser.

Practice at your tempo

Slow the form down while you learn voice leading, then raise the BPM once the harmony feels stable.

Save reusable practice songs

Name the sketch, keep the chords and mixer settings, and reopen it later from the song menu.

FAQ

Backing track generator questions

Can I use it for jazz practice?

Yes. It accepts common chord symbols like maj7, m7, 7, sus, altered dominant shorthand, slash chords, and multi-chord bars.

Can I use other styles?

Yes. The beta includes several backend styles, and the style catalog can grow without changing the public app contract.

Does the frontend expose the style files?

No. The browser requests a rendered MIDI result from the backend; raw style assets stay outside public files.

Can I write lyrics here?

Yes. Open the Lyrics panel if the practice sketch also needs words, cues, or arrangement notes.

Create a backing track and start improvising

Open Comp, type the changes, choose a style, and play over your own form.

Open Fiume Comp