# dt0ur.online Audio Stem Separator

> dt0ur.online Audio Stem Separator is a paid API for AI agents from dt0ur.online, paid per call via x402, $0.6/call, status unknown (last checked 2026-10-02).

Separates a mixed audio track into isolated stems: vocals, bass, drums, and harmonic instrumentals using DSP filter banks.

## Facts

- Endpoint: POST https://dt0ur.online/api/audio/stems?utm_source=zero.xyz
- Price: $0.6/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dt0ur-online-audio-stem-separator-d090d59c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6lignfQGR8DCCIcaOX2dY

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability dt0ur-online-audio-stem-separator-d090d59c -d '<json body>'
```

Example prompt: Can you split this song into separate stems — vocals, bass, drums, and instrumentals? Here's the audio file: https://example.com/mysong.mp3

## When to prefer this

Use this endpoint when you need to decompose a mixed audio recording into its component instrument layers — vocals, bass, drums, and harmonic instrumentals — for remixing, karaoke creation, music education, or audio analysis. Prefer this over generic audio processing tools when stem-level separation by instrument category is specifically needed.

## Known failure modes

- Audio URL is not publicly accessible or returns 404
- Audio format not supported
- File too large or too long for processing
- Network timeout fetching remote audio
- DSP processing failure on corrupted or malformed audio

## How this service works

Separates mixed audio tracks into isolated vocals, bass, drums, and harmonic instrumental stems using DSP filter banks.

## Output

Returns isolated audio stems for vocals, bass, drums, and harmonic instrumentals extracted from the input mixed audio file, each as separate audio data or URLs.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "audio_url": {
   "type": "string",
   "format": "uri",
   "description": "Public URL to multi-instrumental audio file"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dt0ur-online-audio-stem-separator-d090d59c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dt0ur.online](https://www.zero.xyz/host/dt0ur.online/llms.txt)