The short answer: A free backing-track builder in the browser — no account, and no library to subscribe to. Pick a key, drop in chords from the diatonic palette or start from one of 22 ready progressions, and press play — piano, guitar, bass and drums play it back at any tempo from 40 to 240 BPM in 4/4, 3/4 or 6/8. Arrange it into repeating sections, watch the matching scale light up under each chord as it passes, and export a printable chord chart. Everything lives in the page, so a link carries the whole track.
Last updated: August 2026
Practising alone is easier when something is playing back. Backing Tracks turns a chord progression into a full band you control — the harmony you actually want to solo over, at the tempo you can actually play, looping the one section you keep fumbling.
Choose a tonic and whether the key is major or minor, and the palette fills with the diatonic chords of that key, labelled by scale degree — so the chords that fit are the ones in front of you. Beyond them, a fuller set covers 29 chord qualities: triads (major, minor, diminished, augmented), sevenths and their extensions (m7, maj7, dim7, m7♭5, 9, 11, 13), suspensions (sus2, sus4, 7sus4), altered dominants (7♭5, 7♭9, 7♯9), and colour chords like add9 and 6/9. Each chord can carry its own bass note, so slash chords and a walking bass line are a field away.
If you would rather not start from a blank page, the progression library holds 22 named progressions grouped into 12 style families — pop, rock, melodic, hip hop, disco, reggae, jazz, blues, classical, waltz, folk and soul. They are the ones worth knowing by name: the Pop Axis four-chord backbone, the 50s doo-wop turnaround, Pachelbel's Canon, the jazz ii–V–I, the 12-bar blues and its quick-change variant, the campfire folk turnaround, a soul ii–V–I–vi loop.
A track is made of sections, each with its own chords and its own repeat count, so a verse that runs twice and a chorus that runs four times are two numbers rather than twenty copied bars. Chords are resized by dragging, so one chord can hold two beats while the next takes half of one. Any section can carry a short note to itself — "play softly", "build up" — and any single section can be looped on its own while you drill it, then released to play the whole track through.
Four instruments play the progression back: piano, guitar, bass and drums. Between them there are 11 sound options — sampled studio instruments, streamed grand piano and electric bass, steel-string, classical and electric guitars, synthesized alternatives, and an acoustic or synth drum kit. Twenty-six accompaniment styles decide *how* the band plays the same chords: pop, rock, melodic, hip hop, disco, reggae, jazz, blues, classical and waltz feels, several variations each. Tempo runs from 40 to 240 BPM, and the time signature can be 4/4, 3/4 or 6/8.
A live scale panel names the scale that fits the chord currently sounding and redraws as the progression moves, so the note choices for the next four bars are on screen before you get there. It reads both ways: one scale for the whole track, and the specific scale over each chord.
The whole track — key, tempo, sections, chords, instruments — is encoded into the page's own link, so sharing a track is sharing a URL and the person who opens it gets the track, not a description of it. A free account adds saving tracks by name and opening them from any device, and a saved track can be added straight to a jam so everyone at the session plays the same thing — see how to run a jam night. Any track can be exported as a printable chord chart as a PDF, with optional scale-degree badges under the chord names.
Do I need an account to make a backing track? No. Building, playing, sharing by link and exporting a PDF all work signed out. An account is only needed to save tracks by name and reopen them from another device.
Can I change how the band plays without changing the chords? Yes — that is what the 26 accompaniment styles do. The chords stay put; the feel, rhythm and voicing change.
What tempos and time signatures are supported? 40 to 240 BPM, in 4/4, 3/4 or 6/8.
How do I know what to play over it? The live scale panel names the scale under the chord that is currently sounding and updates as the track moves, both for the whole track and chord by chord.