All prebuilt tools MERGE AUDIO FILES API

Merge Audio Files with an API

Join two to six audio files — voiceover chunks, podcast segments, TTS parts — into one normalized MP3 or WAV. Run the preset directly on this page or call the same agent-ready endpoint from your product.

Run this tool View API recipe

LIVE TOOL

Run merge audio

Drop a video, adjust the defaults if you need to, and download the result here.

BEFORE / AFTER

See what the tool changes.

A real example: the after side is the unedited output of a KinoPipe job. Run the live form above to generate the same result from your own media.

BeforeSeparate audio files

Source audio48 kHz · stereo

2 sources · MP3

AfterOne audio file

Ready

Merged audio48 kHz · stereo

Tracks joined in order at 44.1 kHz stereo

1 normalized MP3

Demo footage: public-domain timelapses (Bureau of Land Management, Oregon · NASA SVS). Processed by the same pipeline the API and MCP tools call.

BUILT FOR AUTOMATION

Useful defaults, typed options.

The tool slug stays stable while your agent supplies named media inputs and a narrow set of documented options.

Two to six inputs
Mixed formats and sample rates
Video inputs contribute their audio track

What this preset does

01Download every audio input
02Normalize sample rate and channels
03Join tracks in the supplied order
04Encode one MP3 or WAV

Stable endpointPOST /api/v1/tools/merge-audio

Live API request

SYNCED WITH FORM

{
  "inputs": [
    { "id": "main", "url": "https://example.com/part-1.mp3" },
    { "id": "clip-2", "url": "https://example.com/part-2.mp3" }
  ],
  "options": { "format": "mp3" }
}

Successful output example

{
  "result": {
    "output": {
      "filename": "merge-audio-output.mp4",
      "contentType": "video/mp4",
      "byteSize": 437021,
      "downloadUrl": "https://cdn.kinopipe.com/…"
    }
  }
}

CONSTRAINTS