Sound

Remove background noise from speech

Remove steady background noise from under speech: a river, a fan, a street. Trained on voices, so keep it off music.

Shown on A narration recorded beside a river

Before · the same request without it

After · Remove the river from under the voice, including while it speaks.

Transcript

High above the city, on a tall column, stood the statue of the Happy Prince. He was gilded all over with thin leaves of fine gold.

The entry

Add it to a clip's effects list. Entries run in the order you write them.

{
  "type": "voiceDenoise"
}

Settings

Name	Accepts	Default	What it does
amount	0 to 1	1	0 to 1, how much of the noise is removed.

Run it

The whole request behind the render above. Paste it as it is, or swap the file for your own.

TypeScript SDK cURL

import { createClient, outputUrl } from "@rendobar/sdk";

const rb = createClient({ apiKey: process.env.RENDOBAR_API_KEY });

const job = await rb.jobs.run({
  type: "compose",
  params: {
    schemaVersion: 1,
    output: {
      format: "mp3"
    },
    timeline: {
      tracks: [
        {
          clips: [
            {
              asset: {
                type: "audio",
                src: "https://cdn.rendobar.com/compose/showcase/media/narration-noisy.wav"
              },
              start: 0,
              effects: [
                {
                  type: "voiceDenoise"
                }
              ]
            }
          ]
        }
      ]
    }
  },
});

console.log(outputUrl(job));

Install with npm i @rendobar/sdk. jobs.run() submits and waits, so it returns the finished job in one call.

curl https://api.rendobar.com/jobs \
  -H "Authorization: Bearer $RENDOBAR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"type":"compose","params":{"schemaVersion":1,"output":{"format":"mp3"},"timeline":{"tracks":[{"clips":[{"asset":{"type":"audio","src":"https://cdn.rendobar.com/compose/showcase/media/narration-noisy.wav"},"start":0,"effects":[{"type":"voiceDenoise"}]}]}]}}}'

Returns immediately with a job id. Poll GET /jobs/{id} or register a webhook rather than blocking on the request.

Questions

What does the voiceDenoise effect do in compose?

Remove steady background noise from under speech: a river, a fan, a street. Trained on voices, so keep it off music. Remove the river from under the voice, including while it speaks.

How do I add voice noise removal to a video with an API?

Send a compose job to the Rendobar API with this entry in the timeline: {"type":"voiceDenoise"}. Add it to a clip's effects list. Entries run in the order you write them. The request on this page is complete and renders as shown.

What are the default settings for voice noise removal?

Every setting has a default, so the type on its own is enough: amount 1. Set only the ones you want to change.

Footage and sound

The Happy Prince, by Oscar Wilde, read for LibriVox, by LibriVox volunteer reader. Public domain.
Rogue River rafting (22717455715).webm, by Bureau of Land Management, Oregon and Washington. Public domain.

EQ More low end and more sparkle on a music bed. Compressor Even out a voice so quiet words and loud words sit at one level. Limiter Make music louder without letting the peaks clip. Noise gate Close the microphone when nobody is speaking, so the river drops away before and after the voice. High pass Cut the rumble under a voice. Wind, traffic and water live there. Low pass Music from the next room.

See all 77 in the effects reference →