---
title: "Clean the voice: background noise, hum and echo"
method: POST
path: "/v1/studio/clean-audio"
tags: ["Audio"]
---

# Clean the voice: background noise, hum and echo

`POST /v1/studio/clean-audio`

## Request

- Base URL: `https://apihub.co.il`
- URL: `https://apihub.co.il/v1/studio/clean-audio`
- Auth: HTTP bearer

A video or audio file in, the same file out with its sound cleaned and its picture copied untouched (no re-encode). Background noise — air conditioners, fans, street, café chatter, wind, keyboards, room echo — is reduced with DeepFilterNet 3; 50/60 Hz mains hum is notched out; the voice is gently enhanced (high-pass, de-esser, compressor, presence) only where a measurement calls for it, and set to −16 LUFS. `denoise: auto` (default) measures the noise first and leaves a clean recording or a music bed as it is. The render's `voice` reports the noise found (its level against the voice and its kind), how far it was reduced and every step applied.

**Billing:** Per second of the file at the audio rate (the picture is copied, not rendered) + the voice clean-up per second, only when noise was reduced or the voice enhanced. Failed renders are not charged. · **Rate limit:** 30/min · **Asynchronous**

## Headers

- `Idempotency-Key` string
- `X-Tag` string
- `x-wait-ms` integer

## Request body

- object
  - `format` 'mp4' | 'mov' | 'webm' | 'mp3' | 'wav' | 'm4a': The container to write (default: the file's own; another container gets mp4 for video, m4a for audio). The picture is copied as it is
  - `denoise` 'off' | 'auto' | 'light' | 'strong': Background-noise reduction (DeepFilterNet 3) — default `off` on edit / short / remove-silence, `auto` on clean-audio: `auto` measures the noise and reduces it only when there is some (a clean recording, a music bed or digital silence stays as it is) · `light` a gentle fixed reduction · `strong` as much as the model removes · `off` the sound as recorded. Mains hum (50/60 Hz) is notched out whenever it is found
  - `enhance` boolean: Gentle voice enhancement after the noise: a high-pass at 75 Hz, a de-esser, a 3:1 compressor and a small presence lift — each only when the measurement calls for it (a clean studio voice stays as it is)
  - `normalize` boolean: Set the cleaned sound to −16 LUFS, the social-media standard, with peaks under −1 dBTP
  - `video_url` string, uri, required: Public URL of the video or audio file (mp4, mov, webm, mp3, wav, m4a, ogg…) — or the `url` of a previous render

## Response `200`

Completed (or 202 while processing)

- object
  - `id` string: Execution id — stable across internal retries; use it with GET /v1/executions/{id}
  - `status` 'pending' | 'processing' | 'completed' | 'partial' | 'failed' | 'cancelled' | 'timeout'
  - `operation` string
  - `tag` string, nullable: Your X-Tag, if sent
  - `created_at` string, date-time
  - `completed_at` string, date-time, nullable
  - `output` object: Operation result (see each operation). While a Studio render is processing: `stage` (queued · transcribing · downloading · preparing · cleaning_voice · mixing_audio · rendering · finishing), `phase` (the engine's: download · prepare · voice · audio · encode · qa · upload, or null), `progress` (a percent, 0–100) and `progress_fraction` (0–1), `eta_seconds` (seconds left, never below 0) and `estimate_seconds`
  - `error` string, nullable
  - `usage` object
    - `credits_charged` number, nullable
    - `credits_reserved` number
    - `estimated_credits` number
    - `cost_source` 'provider_reported' | 'calculated' | 'estimated' | 'null', nullable
    - `provider_usage` object, nullable: Normalised consumption, e.g. { VIDEO_SECOND: 22.4 }
  - `balance` object
    - `available` number
    - `reserved` number

## Other responses

- `202`: Processing — poll GET /v1/executions/{id}
- `400`: Invalid input
- `402`: Insufficient credits / project budget
- `404`: Resource not found (or not yours)
- `429`: Rate limited
- `503`: Service temporarily paused

---

[API](https://skmtc.dev/apihub/apis/apihub-one-api-for-chat-image-video-ai.md) · [All operations](https://skmtc.dev/apihub/apis/apihub-one-api-for-chat-image-video-ai/llms.txt) · [OpenAPI document](https://skmtc.dev/apihub/apis/apihub-one-api-for-chat-image-video-ai/revisions/a8caa42835ce?raw)