ConvertOnline

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1. Convert Online
2. Audio Converters
3. AIFF to M4R

{
  "convert": "aiff-m4r",
  "multiple": true,
  "from": "aiff",
  "to": "m4r",
  "note": "M4R is the ringtone format used by iPhones and is essentially a renamed AAC file. For compatibility, the output audio must be under 40 seconds. Make sure to trim the source audio or limit the duration before converting.",
  "controls": [
    {
      "type": "dropdown",
      "name": "bitrate",
      "label": "Audio Bitrate",
      "options": [
        {
          "label": "64 kbps",
          "value": "64k"
        },
        {
          "label": "96 kbps",
          "value": "96k"
        },
        {
          "label": "128 kbps (Standard)",
          "value": "128k"
        },
        {
          "label": "192 kbps",
          "value": "192k"
        },
        {
          "label": "256 kbps",
          "value": "256k"
        }
      ],
      "defaultValue": "128k",
      "desc": "Sets the output audio bitrate. Apple recommends 128 kbps for ringtones, which balances quality and file size."
    },
    {
      "type": "dropdown",
      "name": "channels",
      "label": "Audio Channels",
      "options": [
        {
          "label": "Mono (1 channel)",
          "value": 1
        },
        {
          "label": "Stereo (2 channels)",
          "value": 2
        }
      ],
      "defaultValue": 2,
      "desc": "Choose mono or stereo output. Mono produces smaller files, while stereo preserves spatial effects in ringtones."
    },
    {
      "type": "dropdown",
      "name": "sample_rate",
      "label": "Sample Rate (Hz)",
      "options": [
        {
          "label": "22050 Hz",
          "value": 22050
        },
        {
          "label": "44100 Hz (Recommended)",
          "value": 44100
        },
        {
          "label": "48000 Hz",
          "value": 48000
        }
      ],
      "defaultValue": 44100,
      "desc": "Sets the sample rate for the ringtone. 44100 Hz is standard for AAC and works best on iPhones."
    },
    {
      "type": "number",
      "name": "duration_limit",
      "label": "Max Duration (seconds)",
      "range": {
        "min": 1,
        "max": 40
      },
      "defaultValue": 30,
      "unit": "sec",
      "desc": "Ringtones must be 40 seconds or shorter to be recognized by iPhones. You can set the desired maximum duration here."
    }
  ],
  "type": "audio"
}