ConvertOnline

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1. Convert Online
2. Audio Converters
3. MP3 to AMR

{
  "convert": "mp3-amr",
  "multiple": true,
  "from": "mp3",
  "to": "amr",
  "note": "AMR is designed for speech and mobile telephony. It only supports mono (1 channel) and a fixed sample rate of 8000 Hz. Suitable for voice recordings, not music.",
  "controls": [
    {
      "type": "dropdown",
      "name": "bitrate",
      "label": "Audio Bitrate",
      "options": [
        {
          "label": "4.75 kbps",
          "value": "4.75k"
        },
        {
          "label": "5.15 kbps",
          "value": "5.15k"
        },
        {
          "label": "5.90 kbps",
          "value": "5.90k"
        },
        {
          "label": "6.70 kbps",
          "value": "6.70k"
        },
        {
          "label": "7.40 kbps",
          "value": "7.40k"
        },
        {
          "label": "7.95 kbps",
          "value": "7.95k"
        },
        {
          "label": "10.2 kbps",
          "value": "10.2k"
        },
        {
          "label": "12.2 kbps (Max)",
          "value": "12.2k"
        }
      ],
      "defaultValue": "12.2k",
      "desc": "AMR uses narrowband bitrates suitable for voice. 12.2 kbps offers the best quality supported by the codec."
    },
    {
      "type": "dropdown",
      "name": "channels",
      "label": "Audio Channels",
      "options": [
        {
          "label": "Mono (1 channel)",
          "value": 1
        }
      ],
      "defaultValue": 1,
      "desc": "AMR only supports mono audio. Stereo input will be downmixed to mono."
    },
    {
      "type": "dropdown",
      "name": "sample_rate",
      "label": "Sample Rate (Hz)",
      "options": [
        {
          "label": "8000 Hz",
          "value": 8000
        }
      ],
      "defaultValue": 8000,
      "desc": "AMR only supports a sample rate of 8000 Hz, suitable for narrowband voice audio."
    }
  ],
  "type": "audio"
}