How to convert AC3 to AMR
- Add your .AC3 file - drop it in the box above or click to browse.
- Convert it to .AMR in a few seconds.
- Download your new .AMR file.
What to expect
- AC3 is re-encoded to a narrowband mono speech codec, so surround channels are downmixed and fidelity drops sharply.
- AMR is optimised for voice at low bitrate; music and effects come out noticeably degraded.
- Both formats are lossy, so this is a lossy-to-lossy step with no way to recover the original detail.
Frequently asked questions
Will AC3 to AMR sound worse?
Significantly, for anything but speech. AC3 is a multichannel Dolby Digital format while AMR is a narrowband, mono speech codec tuned for voice at very low bitrates. Music and surround content are heavily degraded, so this conversion only makes sense for spoken-word audio.
Why convert AC3 to AMR?
AMR is the voice codec of GSM and 3G phones, so the conversion targets old handsets and voice applications that expect it. It prioritises tiny file size and speech intelligibility over fidelity.
What happens to the surround channels?
AMR is mono, so AC3's up-to-5.1 channels are downmixed to a single channel. Any spatial or multichannel information is discarded in the process.
Where does an AMR file play?
AMR opens in VLC on any platform and on the mobile devices and voice apps built around the format. It is a speech format, so general music players may handle it poorly or not at all.
