# AI karaoke maker and instrumental maker

Turn any song or music video into a clean instrumental backing track.

## Studio-grade backing tracks for rehearsals, covers, and live shows

Audo's AI karaoke maker and instrumental maker turns any song or video into a clean backing track (WAV, MP3, M4A, AAC, FLAC, OGG, Opus, WebM, AIFF, MP4, MOV, MKV, WebM, AVI) up to 10 GB without an account, with the first 45 seconds free 3 times a day and no sign-up. Singers preparing for auditions, wedding bands learning requests, and choir directors making rehearsal tracks often need an instrumental version that was never released officially.

Standard karaoke tracks re-recorded by session bands rarely match the tempo rubato, key changes, or horn arrangements of the real record. By removing vocals directly from the original master with Mel-Band RoFormer and keeping the exact stereo residual, Audo gives you the authentic arrangement with the lead singer taken out.

After downloading your instrumental, you can trim a long intro or fade out an ending in Cut audio, or match the playback level across a whole setlist with Boost volume.

Tool: Split stems (`split_audio`). The same tool's other pages: https://audo.ai/vocal-remover.md, https://audo.ai/stem-splitter.md, https://audo.ai/remove-music-from-video.md. Price: 8 credits a minute — $0.08/min ($4.80/hr), with no subscription — of input for whole files, charged only when a job succeeds.

## Free API

```bash
curl -F file=@song.mp3 -F stems=instrumental https://audo.ai/api/try/split-stems -D response.headers -o response.body
```

Read response.headers and response.body before naming media. Handle 202, 200 JSON and errors with the complete response client at https://audo.ai/docs/api?utm_source=markdown&utm_medium=agent#responses.

Free for the first 45 seconds of each file, 3 times a day per person, with no key or account. Uploads up to 10 GB, 2 at once from one address. The response is the result itself; a job that runs longer than about 30 seconds returns 202 with a link to check on it. With an API key (`-H "Authorization: Bearer $AUDO_API_KEY"`), omitting free runs the whole file with credits if the balance covers it, otherwise the free portion if quota remains. Set free=true to prohibit spending; for paid whole files use free=false with an approved positive max_credits. A free result cut short comes with finishUrl (and the Audo-Finish-Url header when the response is the file itself): give it to the person, who pays there (from $5, no sign-up), and the whole file runs; keep checking the status link, whose finishedBy names the whole-file job and its own status link. Details: https://audo.ai/docs/api.md

## Options

Form fields with the same names as the MCP tool's inputs:

- `stems`: Which stems to separate: vocals (vocals first, then instrumental), instrumental (instrumental backing track first, then vocals), four_stems (vocals, drums, bass, and other), or dialogue (music-removed mix first, then dialogue, music, and sound effects). Default vocals.
- `output_format`: The result's format: same (as the input; a video stays a video), wav, mp3, m4a, or flac. Default same.

## Languages

Any language: it works on the sound, not the words.

## From an assistant (MCP)

Add https://audo.ai/mcp and sign in (setup for each assistant: https://audo.ai/setup.md). The tool is `split_audio`:

> Separates a song or video into true stereo stems: vocals and instrumental (vocals or instrumental first), 4 stems (vocals, drums, bass, and other), or dialogue, background music, and sound effects (with a music-removed mix first). Works on video: when output_format is same, the first stem keeps the original video picture. Set free to true to do the first 45 seconds at no cost, up to 3 times a day; otherwise it costs 8 credits a minute, charged only if the job succeeds. Returns job_id; then call get_job.

Example: "Use Audo to make a karaoke instrumental track from song.mp3."

## More

- Every tool: https://audo.ai/llms.txt
- OpenAPI: https://audo.ai/api/openapi.json
- This page for people: https://audo.ai/karaoke-maker?utm_source=markdown&utm_medium=agent