Takes an audio or video file and removes electrical mains hum — the steady buzz
Takes an audio or video file and removes electrical mains hum — the steady buzz at 50 Hz (Europe and most of the world) or 60 Hz (North America) and its harmonics — with narrow notch filters (Q 30) on the fundamental and up to eight harmonics, so speech and music outside those narrow bands stay untouched. Choose the mains frequency or leave it on 50 by default; the number of harmonics is selectable.
Answeringour last check, 2026-10-31
1 of 1checks answered this week
1050 msmedian answer time
$0.003listed price per call
$0.003price 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
POST https://medien.halowerk.com/v1/hum-remove
| 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 | $0.003 | 1050 ms |
Example input (from the provider)
{
"body": {
"duration_minutes": 1,
"harmonics": 4,
"mains_hz": 50,
"source": {
"url": "https://static.deepgram.com/examples/Bueller-Life-moves-pretty-fast.wav"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"duration_minutes": {
"description": "Length in started minutes \u2014 this is what you are billed for.",
"maximum": 60,
"minimum": 1,
"type": "integer"
},
"harmonics": {
"default": 4,
"maximum": 8,
"minimum": 1,
"type": "integer"
},
"mains_hz": {
"default": 50,
"enum": [
50,
60
],
"type": "integer"
},
"output_format": {
"default": "mp3",
"enum": [
"opus",
"mp3",
"wav",
"flac"
],
"type": "string"
},
"source": {
"additionalProperties": false,
"description": "The recording. Either url or content_base64.",
"properties": {
"content_base64": {
"description": "The file inline, base64. Larger files by url.",
"maxLength": 12000000,
"type": "string"
},
"filename": {
"maxLength": 260,
"type": "string"
},
"url": {
"description": "Public http(s) URL of the file.",
"maxLength": 2048,
"type": "string"
}
},
"type": "object"
}
},
"required": [
"source",
"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"
}