Loudness maths
Loudness maths: gain to a LUFS target or platform, resulting true peak vs ceiling, or combining segment loudness.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
408 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://audio-calc.x402tookit.com/lufs-math
| Category | Image and media |
|---|---|
| Provider host | audio-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| 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 |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.02 | 408 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"ceilingDbtp": -1,
"lufs": -9.5,
"target": "spotify",
"truePeakDbtp": -0.3
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"ceilingDbtp": {
"description": "True-peak ceiling in dBTP (default -1)",
"type": "number"
},
"lufs": {
"description": "Measured integrated loudness in LUFS (negative), for example -9.5",
"type": "number"
},
"segments": {
"description": "To combine: lufs:seconds pairs, for example -20:30,-10:30",
"type": "string"
},
"target": {
"description": "Target LUFS or a name: spotify, youtube, apple-music, amazon-music, tidal, podcast, ebu-r128, atsc-a85, arib-tr-b32",
"type": "string"
},
"truePeakDbtp": {
"description": "Measured true peak in dBTP, to predict the peak after the gain",
"type": "number"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"ceilingDbtp": {
"type": [
"null",
"number"
]
},
"combinedLufs": {},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"gainDb": {
"type": [
"null",
"number"
]
},
"gainLinear": {
"type": [
"null",
"number"
]
},
"limitingNeeded": {
"type": [
"boolean",
"null"
]
},
"loudestSegmentLufs": {},
"measuredLufs": {
"type": [
"null",
"number"
]
},
"mode": {
"type": [
"null",
"string"
]
},
"newTruePeakDbtp": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"peakHeadroomDb": {
"type": [
"null",
"number"
]
},
"platform": {
"type": [
"null",
"string"
]
},
"platformTargets": {
"properties": {
"amazon-music": {
"type": [
"null",
"number"
]
},
"apple-music": {
"type": [
"null",
"number"
]
},
"arib-tr-b32": {
"type": [
"null",
"number"
]
},
"atsc-a85": {
"type": [
"null",
"number"
]
},
"ebu-r128": {
"type": [
"null",
"number"
]
},
"podcast": {
"type": [
"null",
"number"
]
},
"spotify": {
"type": [
"null",
"number"
]
},
"tidal": {
"type": [
"null",
"number"
]
},
"youtube": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"quietestSegmentLufs": {},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"segmentCount": {},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"targetLufs": {
"type": [
"null",
"number"
]
},
"totalSeconds": {},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
]