Convert Stereo to Mono Audio via API

Downmix stereo audio to mono for podcasts, voice recordings, phone systems, and any use case where a single channel is preferred or required.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

Use the API

curl -X POST https://renderio.dev/v1/commands \
  -H "X-API-KEY: ffsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
  "ffmpeg_command": "-i {in_audio} -ac 1 {out_audio}",
  "input_files": {
    "in_audio": "https://example.com/input.mp3"
  },
  "output_files": {
    "out_audio": "output.mp3"
  }
}'

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Common Variations

WAV output

-i input.wav -ac 1 output.wav

Left channel only

-i input.mp3 -af "pan=mono|c0=FL" output.mp3

Right channel only

-i input.mp3 -af "pan=mono|c0=FR" output.mp3

Related Operations

Convert Mono to Stereo Audio via API | RenderIO Normalize Video Audio via API | RenderIO Convert MP3 to WAV via API | RenderIO Extract Audio from Video via API | RenderIO

Need to process at scale?

Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.

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