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Relaystation Audio Mix
x402
Relaystation Audio Mix is a paid API for AI agents from api.relaystation.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Mixes multiple audio tracks into a single output using amix, with optional loudness normalization — ideal for combining voiceover and background music in one API call
Price / call$0.01
Success—
StatusUnknown
How this service works
$0.0005/MB. Mix multiple audio tracks down to one (amix), optional loudness normalize — voiceover + music in one call. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny
Output
A single mixed-down audio file combining all input tracks, optionally loudness-normalized. Pricing is $0.0005/MB of input data with a 1¢ minimum; any remainder is auto-credited to the account.
Example use cases
Podcast voiceover and music blend
“I have a narration track and a soft background music track for my podcast intro — can you mix them together into one audio file with loudness normalization turned on so the music doesn't overpower the voice?”
Video ad audio post-production
“Combine these three audio layers — the spokesperson voiceover, the sound effects track, and the background music — into a single mixed-down audio file I can attach to my video ad.”
Automated audiobook chapter assembly
“I've got a chapter narration file and a subtle ambient music track — merge them into one normalized audio file for the audiobook chapter.”
Technical details
Endpoint
POSThttps://api.relaystation.ai/v1/media/audio-mixWhen to prefer
Choose this endpoint when you need to combine multiple audio tracks (e.g. voiceover plus music) into a single output file programmatically, especially within an automated agent workflow where per-MB pricing and optional loudness normalization are desirable. Ideal for content pipelines, podcast production, video post-production, and any use case requiring serverless audio mixing without managing FFmpeg infrastructure.
Side effects
- Unsupported audio format returns an error
- Missing or malformed audio track input causes a 400 bad request
- Exceeding size or track count limits may result in rejection
- Insufficient USDC balance to cover the call results in payment failure
- Network timeout on large audio files
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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