Audiobook mastering checker

Open Audiobook mastering checker on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "audiobook-mastering-checker",
  "category": "media-tools",
  "built": true,
  "requirements": "Up to 8 files at once, each up to 256 MiB, 10 minutes, 8 channels and 60 million samples, with at most 512 MiB and 120 million samples in total. Each file needs at least 500 milliseconds of audio. RMS limits from -60 to 0 dBFS, peak limit from -30 to 0, noise floor limit from -120 to -20 dBFS, silence limits from 0 to 30 seconds and a silence threshold from -90 to -30 dBFS. WAV is read directly with every channel and sample intact. MP3, M4A, AAC, FLAC, OGG, Opus and WebM are decoded by your browser and resampled to 48 kHz first, so decoding support depends on the browser. Files are decoded and measured on your device and are never uploaded. Downloads: JSON report per file and a CSV of every check with measured value, unit, limits and result.",
  "implementation": {
    "fields": [
      {
        "key": "rmsMin",
        "label": "Lowest RMS level (dBFS)",
        "value": "-23",
        "type": "number",
        "min": -60,
        "max": 0,
        "step": 0.1
      },
      {
        "key": "rmsMax",
        "label": "Highest RMS level (dBFS)",
        "value": "-18",
        "type": "number",
        "min": -60,
        "max": 0,
        "step": 0.1
      },
      {
        "key": "peakMax",
        "label": "Highest peak (dBFS or dBTP)",
        "value": "-3",
        "type": "number",
        "min": -30,
        "max": 0,
        "step": 0.1
      },
      {
        "key": "peakMode",
        "label": "Peak measurement",
        "value": "sample",
        "type": "select",
        "values": [
          "sample",
          "true"
        ],
        "labels": {
          "sample": "Sample peak",
          "true": "True peak"
        }
      },
      {
        "key": "noiseFloorMax",
        "label": "Highest noise floor (dBFS)",
        "value": "-60",
        "type": "number",
        "min": -120,
        "max": -20,
        "step": 0.1
      },
      {
        "key": "headSilenceMin",
        "label": "Shortest opening silence (seconds)",
        "value": "0.5",
        "type": "number",
        "min": 0,
        "max": 30,
        "step": 0.01
      },
      {
        "key": "headSilenceMax",
        "label": "Longest opening silence (seconds)",
        "value": "1",
        "type": "number",
        "min": 0,
        "max": 30,
        "step": 0.01
      },
      {
        "key": "tailSilenceMin",
        "label": "Shortest closing silence (seconds)",
        "value": "1",
        "type": "number",
        "min": 0,
        "max": 30,
        "step": 0.01
      },
      {
        "key": "tailSilenceMax",
        "label": "Longest closing silence (seconds)",
        "value": "5",
        "type": "number",
        "min": 0,
        "max": 30,
        "step": 0.01
      },
      {
        "key": "silenceThreshold",
        "label": "Silence threshold (dBFS)",
        "value": "-60",
        "type": "number",
        "min": -90,
        "max": -30,
        "step": 1
      },
      {
        "key": "sampleRate",
        "label": "Required sample rate (Hz)",
        "value": "44100",
        "type": "select",
        "values": [
          "44100",
          "48000",
          "22050",
          "96000",
          "any"
        ]
      },
      {
        "key": "channels",
        "label": "Required channels",
        "value": "any",
        "type": "select",
        "values": [
          "any",
          "mono",
          "stereo"
        ]
      }
    ],
    "registrationFamily": "audio-pcm-measurement",
    "presentation": "metrics",
    "files": true,
    "input": false,
    "accept": ".wav,.mp3,.m4a,.aac,.flac,.ogg,.oga,.opus,.webm,audio/*",
    "maxFileBytes": 268435456,
    "inputErrorCode": "AUDIO_PCM_MEASUREMENT_TOO_LONG",
    "multiple": true,
    "note": "Runs locally in your browser. Checks up to 8 recordings, each up to 10 minutes and 256 MiB, against the specification you enter.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Audio files",
      "placeholder": "Choose up to 8 WAV, MP3, M4A, FLAC or OGG chapter files",
      "help": "Enter your specification in the settings below. Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Enter your specification in the settings below.",
        "Up to 1,000,000 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

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