ConvertOnline

Image

Audio

Video

Document

Color

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

{
  "convert": "amr-opus",
  "multiple": true,
  "from": "amr",
  "to": "opus",
  "note": "AMR is a narrowband format (used in telephony) with low sample rate and mono audio. When converting to Opus, you can upscale sample rate and channels, but quality will still be limited by the original AMR source.",
  "controls": [
    {
      "type": "dropdown",
      "name": "bitrate",
      "label": "Audio Bitrate",
      "options": [
        {
          "label": "16 kbps (AMR quality)",
          "value": "16k"
        },
        {
          "label": "32 kbps",
          "value": "32k"
        },
        {
          "label": "48 kbps",
          "value": "48k"
        },
        {
          "label": "64 kbps",
          "value": "64k"
        },
        {
          "label": "96 kbps",
          "value": "96k"
        }
      ],
      "defaultValue": "32k",
      "desc": "Sets the target bitrate for the Opus audio. Opus is efficient at low bitrates, so even 32–48 kbps can sound good for speech."
    },
    {
      "type": "dropdown",
      "name": "channels",
      "label": "Audio Channels",
      "options": [
        {
          "label": "Mono (1 channel)",
          "value": 1
        },
        {
          "label": "Stereo (2 channels)",
          "value": 2
        }
      ],
      "defaultValue": 1,
      "desc": "AMR is always mono, but you may upscale to stereo when converting to Opus. For voice recordings, mono is typically preferred."
    },
    {
      "type": "dropdown",
      "name": "sample_rate",
      "label": "Sample Rate (Hz)",
      "options": [
        {
          "label": "8000 Hz (original AMR quality)",
          "value": 8000
        },
        {
          "label": "16000 Hz",
          "value": 16000
        },
        {
          "label": "24000 Hz",
          "value": 24000
        },
        {
          "label": "48000 Hz (Opus standard)",
          "value": 48000
        }
      ],
      "defaultValue": 16000,
      "desc": "AMR uses 8000 Hz, but Opus supports higher sample rates. You can choose a higher rate to reduce distortion, though original quality won't improve."
    }
  ],
  "type": "audio"
}