ConvertOnline

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

{
  "convert": "amr-aac",
  "multiple": true,
  "from": "amr",
  "to": "aac",
  "note": "AMR is a narrowband codec (8 kHz, mono) mainly used in telephony. When converting to AAC, you can optionally upscale the sample rate and channels, but the original audio quality will remain low due to AMR's limitations.",
  "controls": [
    {
      "type": "dropdown",
      "name": "bitrate",
      "label": "Audio Bitrate",
      "options": [
        {
          "label": "32 kbps",
          "value": "32k"
        },
        {
          "label": "64 kbps",
          "value": "64k"
        },
        {
          "label": "96 kbps",
          "value": "96k"
        },
        {
          "label": "128 kbps (Standard)",
          "value": "128k"
        },
        {
          "label": "192 kbps",
          "value": "192k"
        }
      ],
      "defaultValue": "64k",
      "desc": "Sets the bitrate for the AAC output. Since AMR is low quality, higher bitrates may not improve actual sound quality but may be used for compatibility."
    },
    {
      "type": "dropdown",
      "name": "channels",
      "label": "Audio Channels",
      "options": [
        {
          "label": "Mono (1 channel)",
          "value": 1
        },
        {
          "label": "Stereo (2 channels)",
          "value": 2
        }
      ],
      "defaultValue": 1,
      "desc": "AMR audio is always mono. You can upscale to stereo for compatibility, but it won't enhance the original audio."
    },
    {
      "type": "dropdown",
      "name": "sample_rate",
      "label": "Sample Rate (Hz)",
      "options": [
        {
          "label": "8000 Hz (Original)",
          "value": 8000
        },
        {
          "label": "16000 Hz",
          "value": 16000
        },
        {
          "label": "22050 Hz",
          "value": 22050
        },
        {
          "label": "44100 Hz (Standard)",
          "value": 44100
        }
      ],
      "defaultValue": 8000,
      "desc": "AMR files are recorded at 8000 Hz. You can convert to a higher sample rate, but it won't improve fidelity."
    }
  ],
  "type": "audio"
}