Audio Loudness Normalizer takes one audio file and returns the same file with normalized loudness. Send a binary audio upload in the file field, and get a binary audio file back.
Use it when you need consistent playback levels across a library of clips, podcasts, voice notes, or user-generated uploads. Normalizing loudness helps reduce abrupt volume jumps between tracks and makes content easier to review, publish, or batch process.
The request schema is intentionally simple: a single file upload, up to 30 MB. The response is the normalized audio file itself, so you can pass it directly into storage, playback, or the next step in your pipeline without parsing a JSON wrapper.
If your workflow handles mixed audio content, this endpoint gives you a direct normalization step that fits cleanly between ingestion and distribution.
Upload one audio file to normalize it.
curl -X POST "https://api.eu.apyhub.com/freedailypro/normalize-audio-loudness-api/audio-normalize" \
-H "apy-token: $APY_TOKEN" \
-F "file=@/path/to/audio.mp3"Returns a binary file (string with format: binary) containing the normalized audio.
Loading your default key…Normalizes the loudness of an uploaded audio file and returns the processed audio as a binary file.
| Parameter | Type | Mandatory | Description |
|---|---|---|---|
| file | String | Yes | The audio file. Up to 30 MB. Format: binary. |
Returns a binary file containing the normalized audio, not a JSON object.
| Parameter | Type | Description |
|---|---|---|
| binary | File | The response body is binary data containing the loudness-normalized audio. |
Max 100MB total per request (all files combined). Larger? Use this API's URL-based endpoint instead, if it has one.
bad_requestRequired parameter missing or malformed body.
unauthorizedAPI key missing, revoked, or not authorized for this service.
rate_limitedYour plan's per-second rate exceeded. Retry with exponential backoff.
upstream_busyBackend temporarily unavailable. Try again in a few seconds.
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