Developer API

Mix vocals over beats.
One API call.

Send a beat file and a vocal recording. Get back a professionally mixed, mastered MP3 — the same engine powering The Hanger app. No audio engineering required.

8–25 second turnaround

FFmpeg-powered mixing chain runs server-side. No client-side processing needed.

Bearer token auth

SHA-256 hashed API keys. Keys are never stored in plaintext. Revoke anytime.

5 genres, 3 presets

Hip-hop, R&B, Rock, Pop, Spoken Word. Raw, Natural, or Polished mix quality.

API Pricing

All plans include the full mixing engine. Limits reset monthly.

Starter

$19/mo

50 requests/mo

POST /api/v1/mix
All 5 genres
All 3 presets
Usage logs
Email support

Pro

$49/mo

500 requests/mo

Everything in Starter
Priority processing queue
Webhook on completion (coming soon)
Slack support

Enterprise

Custom

Unlimited requests

Everything in Pro
SLA guarantee
Custom genre presets
Dedicated support
Volume discounts

API billing is separate from your app subscription. Contact us to set up billing for your plan.

API Reference

One endpoint. Send files, get a mix.

POST/api/v1/mixmultipart/form-data

Request Parameters

Field	Type	Required	Description
beat	file	required	The instrumental track. MP3, WAV, or M4A. Max 150MB.
vocal	file	required	The vocal recording. MP3, WAV, or M4A. Max 150MB. Mono or stereo.
genre	string	optional	hip-hop (default) \| r&b \| rock \| pop \| spoken-word. Applies genre-specific EQ and compression.
preset	string	optional	raw \| natural (default) \| polished. Controls processing intensity.
beatVolume	number	optional	Beat volume multiplier. 0.1–1.5, default 0.8. Lower to bring vocals forward.

Code Examples

curl

curl -X POST https://hangermusik.studio/api/v1/mix \
  -H "Authorization: Bearer thgr_YOUR_API_KEY" \
  -F "[email protected]" \
  -F "[email protected]" \
  -F "genre=hip-hop" \
  -F "preset=natural" \
  -F "beatVolume=0.8"

Success Response (200)

json

{
  "mixUrl": "https://storage.../api-mixes/123/1714000000000-mix.mp3",
  "processingMs": 12400,
  "genre": "hip-hop",
  "preset": "natural",
  "requestsRemaining": 47
}

Ready to integrate?

Create an account, generate an API key, and start mixing in minutes. No credit card required for your first key.

Mix vocals over beats.One API call.