Stereo to mono downmixer

Open Stereo to mono downmixer 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": "stereo-to-mono-downmixer",
  "category": "media-tools",
  "built": true,
  "requirements": "One stereo recording up to 256 MiB and 10 minutes; custom coefficients from -2 to 2. WAV is read with every sample intact; other formats are decoded by your browser at 48 kHz. Everything is processed on your device and nothing is uploaded. Download: mono WAV in the source format or the format you choose, and a JSON report.",
  "implementation": {
    "fields": [
      {
        "key": "formula",
        "label": "Mix formula",
        "value": "minus-3db",
        "type": "select",
        "values": [
          "minus-3db",
          "average",
          "left",
          "right",
          "custom"
        ],
        "labels": {
          "left": "Left channel only",
          "right": "Right channel only"
        }
      },
      {
        "key": "left",
        "label": "Custom left coefficient",
        "value": "0.5",
        "type": "number",
        "min": -2,
        "max": 2,
        "step": 0.01
      },
      {
        "key": "right",
        "label": "Custom right coefficient",
        "value": "0.5",
        "type": "number",
        "min": -2,
        "max": 2,
        "step": 0.01
      },
      {
        "key": "encoding",
        "label": "WAV sample format",
        "value": "match",
        "type": "select",
        "values": [
          "match",
          "pcm16",
          "pcm24",
          "float32"
        ],
        "labels": {
          "match": "Match source sample format"
        }
      }
    ],
    "registrationFamily": "audio-dsp-edit",
    "presentation": "metrics",
    "files": true,
    "input": false,
    "accept": ".wav,.mp3,.m4a,.aac,.flac,.ogg,.oga,.opus,.webm,audio/*",
    "maxFileBytes": 268435456,
    "inputErrorCode": "AUDIO_DSP_EDIT_TOO_LONG",
    "note": "Runs locally in your browser. Mixes one stereo recording up to 10 minutes to mono and reports the cancellation risk.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Stereo audio file",
      "placeholder": "Choose a stereo recording",
      "help": "Left and right are mixed into one mono channel. Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Left and right are mixed into one mono channel.",
        "Up to 1,000,000 characters.",
        "Review the settings before running."
      ],
      "action": "Convert file"
    },
    "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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