Normalise audio loudness to a broadcast or streaming target, file returned
Normalise audio loudness to a broadcast or streaming target, file returned. Linear two-pass EBU R 128 loudness normalisation to a named target (ebu_r128, atsc_a85, ebu_r128_short, podcast, spotify, youtube, apple_music, amazon_music, deezer, aes_streaming, audiobook_acx) or custom lufs/true_peak. Returns the corrected file (wav, wav16, flac, mp3, m4a, opus) with before/after figures in X-Loudness-Report.
Answeringour last check, 2026-10-18
1 of 1checks answered this week
820 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://sift.srv1996466.hstgr.cloud/v1/audio/normalize
| Category | Image and media |
|---|---|
| Provider host | sift.srv1996466.hstgr.cloud |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | valid payment request | 402 | $0.02 | 820 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"url": "https://sift.srv1996466.hstgr.cloud/samples/tone.mp3"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"format": {
"description": "wav, wav16, flac, mp3, m4a or opus (default mp3)",
"type": "string"
},
"lufs": {
"description": "Custom integrated loudness, -40 to -5",
"type": "number"
},
"target": {
"description": "Named target (default podcast)",
"type": "string"
},
"true_peak": {
"description": "Custom true peak dBTP, -9 to 0",
"type": "number"
},
"url": {
"description": "Audio file URL",
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}