agentutility(7)$ man audio-loudnorm
/audio-loudnorm
PRICE / CALL
$0.02
USDC · base mainnet · scheme: exact
METHOD
POST
CLUSTER
mediakitCATEGORY
media
STATUS
● live
NAME
audio-loudnorm — normalize audio loudness to a target lufs level for podcasts, youtube, and spotify delivery
SYNOPSIS
POST https://x402.agentutility.ai/audio-loudnorm
Content-Type: application/json
X-PAYMENT: <signed-transferWithAuthorization>
{ ... }↳ first call →
402 Payment Required. Sign USDCtransferWithAuthorization, retry with theX-PAYMENT header.DESCRIPTION
Normalize audio loudness to a target LUFS level for podcasts, YouTube, and Spotify delivery. Send an audio_url plus an optional target_lufs (defaults to -16) and true_peak, and it probes duration, runs two-pass EBU R128 loudness normalization, and returns a hosted MP3 URL with the applied target and duration in seconds. Common presets: -23 for broadcast, -16 for podcasts, -14 for streaming platforms. Use it as a loudness normalizer, LUFS correction API, or audio mastering step before publishing.
INPUT — request schema
| property | type | description | req? |
|---|---|---|---|
| audio_url | string | URL of the audio file to normalize. Rejected if longer than 60 minutes. | required |
| target_lufs | number | Default -16. Range -30 to -10. | optional |
| true_peak | number | Default -1.5. Range -9 to 0. | optional |
OUTPUT — response shape
| field | type | description |
|---|---|---|
| audio_url | string | URL of the normalized audio file (hosted by fal.ai) |
| duration_seconds | number | Duration of the source audio in seconds |
| target_lufs | number | The LUFS target that was applied |
| true_peak | number | The true peak limit that was applied |
| source_url | string | Echo of the input URL |
EXAMPLES — two ways to call
EXAMPLE 1 · curl
curl -X POST https://x402.agentutility.ai/audio-loudnorm \
-H 'Content-Type: application/json' \
-d '{ }'first response =
402 Payment Required with payment requirements; sign + retry with X-PAYMENT.EXAMPLE 2 · mcp
# Install the MCP package for this endpoint's cluster npx -y @agentutility/mcp-<cluster> # Required: EVM private key with USDC on Base export X402_PRIVATE_KEY=0x... # Then call the audio-loudnorm tool from your MCP-aware agent.
MCP server handles payment automatically — your coding agent just calls the tool by name.
METADATA
- tags
- audioloudnormpodcastnormalizationebu-r128
- methods
- POST
- cluster
- mediakit
- price
- $0.02 USDC per call
ADJACENT — other endpoints in mediakit
| endpoint | description | price |
|---|---|---|
| add-watermark | Stamp a text or image watermark onto a PDF, image, or video file. | $0.02 |
| csv-to-jsonl | Converts CSV or TSV data into JSON, JSONL/NDJSON, or column-oriented arrays. | $0.02 |
| image-translate | Image translator. | $0.02 |
| image-upscale | Upscales an image 2x or 4x via Venice's image/upscale endpoint (default model: venice-sd35). | $0.02 |
| image-watermark | Image watermark / add text or logo watermark to image files. | $0.02 |
| mp4-to-mp3 | Converts MP4, MOV, WebM, MKV, AVI, M4V, and FLV video files to MP3 via CloudConvert, with selectable bitrate (96/128/192 kbps). | $0.02 |
| mp4-to-mp3-api | Converts MP4, MOV, WEBM, MKV, AVI, M4V, or FLV URLs into hosted MP3 output with selectable 96, 128, or 192 kbps bitrate. | $0.02 |
| mp4-to-mp3-converter | Converts MP4 video URLs into hosted MP3 files with selectable bitrate; also accepts MOV, WEBM, MKV, AVI, M4V, or FLV URLs. | $0.02 |
SEE ALSO