Performance-derived foundation
Key, tempo, and section structure come from the vocal itself — no guessing at BPM, no forcing a free-time performance onto a rigid grid.
Build an Instrumental Around Your Vocal
Build an Instrumental Around Your Vocal
Add new instruments, accompaniments, and production layers to an existing song
Examples
ExamplesChrome Daybreak
SynthwaveInstrumental
3:01
ExamplesWeekend Voltage
Dance PopElectropop
0:45
ExamplesRiver Street Shoes
Chicago BluesSoul
3:00
ExamplesGlass Arcade
Future BassInstrumental
2:59
ExamplesPostcard in Motion
Latin PopTropical
0:45
ExamplesBrass Above Broadway
Jazz-FunkInstrumental
2:59
a band behind the voice
Production that serves the performance
Start from an acapella — sung into a phone or exported from a session — and get full instrumentation built to serve that exact performance.
The engine maps the vocal — its pitch contour, its rhythmic placement, where phrases start and breathe — and derives the musical framework from what you actually sang, including the tempo flex of an unaccompanied performance. Your production brief then decides the world built on that framework: genre, instrumentation, density, dynamics.
The judgment pass mirrors a real session: does the arrangement lift the voice where the song peaks and clear space where the lyric matters? A backing track that competes with its singer has failed no matter how good it sounds alone.
A capella recordings hold everything that matters about a song — melody, words, feel — and none of what makes it playable in public. This tool builds the missing world: upload the vocal, describe the production you hear in your head, and the arrangement engine composes instrumentation that follows your performance's key, tempo, and phrasing.
"Follows" is the operative word. The voice recorded first is the master; the instruments are guests in its house. Drums land with the singer's timing, chords change where the melody implies them, and the dense moments stay out of the vocal's way. A dry, clean recording gives the engine the clearest blueprint to build from.
What gets built around you
Brief-driven arrangements
From bare piano to full-band builds: your description sets instrumentation, energy, and genre, and the engine orchestrates within it.
Voice-first mixing sense
Arrangement density flexes around the vocal, thinning under crucial lyrics and swelling between phrases — accompaniment, in the literal sense.
From acapella to arrangement
The recording carries the information; the brief carries the vision. Prepare both and the build takes care of itself.
- 1
Capture the vocal cleanly
Quiet room, close mic, no music playing in the background. Effects and bleed confuse the analysis — dry and honest wins.
- 2
Describe the world
Name the genre feel, the core instruments, and the energy arc: "sparse verses, drums arrive at the chorus, strings at the end." Arcs beat adjectives.
- 3
Listen for service
Play the result asking one question: is the voice better off? Check the peaks, the quiet lines, and every entrance before calling it done.
Voices that need a band
Singers with phone-recorded ideas
The chorus you sang into voice memos at 2am becomes a produced demo without booking a studio or learning a DAW.
Writers pitching finished songs
Dress the same vocal in two different productions and let the publisher hear which market the song belongs to.
A cappella performers going produced
Vocalists whose art lives unaccompanied can explore what their performances sound like with a world built underneath.
Getting arrangements that flatter
Dry beats polished
A vocal soaked in reverb ties the engine's hands — the space is already painted in. Record dry; let the new production supply the ambience.
Flag the freedom
If you sang rubato — stretching time expressively — say so in the brief. The arrangement can breathe with you instead of marching a grid through your phrasing.
Peak where the song peaks
Tell the engine where the emotional summit is. An arrangement that crescendos in the wrong place rewrites your song's meaning by accident.
Acapella-to-track questions
How clean does my vocal recording need to be?
Cleaner is better, but phone recordings in a quiet room work well. The killers are background music, heavy echo, and clipping — avoid those three and the analysis has what it needs.
Will the instrumental follow my timing or force a grid?
It derives timing from your performance, which is the point: an unaccompanied vocal's natural push and pull becomes the arrangement's tempo map rather than an error to correct.
Can I try several production styles on one vocal?
Yes, and you should — the same performance reads completely differently over piano balladry versus warm electronic production. Generate the candidates and let the song tell you who it is.
What about vocals I didn't record myself?
Use only performances you have rights to build on. A downloaded acapella of a commercial song is still that artist's recording — arrangement doesn't launder ownership.
Build the band your voice deserves
That unaccompanied recording already contains the song. Upload it, describe the production, and hear it stand up fully dressed.
Add the instrumental