Takes a voice recording and a music track and returns one mix in which the music
Takes a voice recording and a music track and returns one mix in which the music is lowered by sidechain compression whenever the voice is present and returns in pauses — the standard podcast and voice-over sound. The music is looped or trimmed to the voice length, starts at the chosen bed level and fades out at the end; the voice is levelled first. Depth of ducking and music level are selectable, and the mix is brought to the target loudness, measured afterwards.
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
POST https://medien.halowerk.com/v1/music-ducking
| Category | Image and media |
|---|---|
| Provider host | medien.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-31 | valid payment request | 402 | $0.004 | 1370 ms |
Example input (from the provider)
{
"body": {
"duration_minutes": 1,
"music": {
"url": "https://medien.halowerk.com/beispiel/musik.mp3"
},
"voice": {
"url": "https://medien.halowerk.com/beispiel/notiz.mp3"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"duck_ratio": {
"default": 8,
"description": "How strongly the music dips under speech.",
"maximum": 20,
"minimum": 2,
"type": "number"
},
"duration_minutes": {
"description": "Length of the voice track in started minutes.",
"maximum": 30,
"minimum": 1,
"type": "integer"
},
"music": {
"additionalProperties": false,
"properties": {
"content_base64": {
"maxLength": 5500000,
"type": "string"
},
"filename": {
"maxLength": 260,
"type": "string"
},
"url": {
"maxLength": 2048,
"type": "string"
}
},
"type": "object"
},
"music_level_db": {
"default": -12,
"description": "Music level when nobody speaks, relative to the voice.",
"maximum": 0,
"minimum": -30,
"type": "number"
},
"output_format": {
"default": "mp3",
"enum": [
"opus",
"mp3",
"wav",
"flac"
],
"type": "string"
},
"target_lufs": {
"default": -16,
"maximum": -12,
"minimum": -24,
"type": "number"
},
"voice": {
"additionalProperties": false,
"properties": {
"content_base64": {
"maxLength": 5500000,
"type": "string"
},
"filename": {
"maxLength": 260,
"type": "string"
},
"url": {
"maxLength": 2048,
"type": "string"
}
},
"type": "object"
}
},
"required": [
"voice",
"music",
"duration_minutes"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}