Here's more info of the same file but different formats, using ffprobe and file command of Linux:

OPUS (size 2.9 MB):

Command: ffprobe -i "OPUS_AUDIO.opus"

Input #0, ogg, from 'OPUS_AUDIO.opus':
   Duration: 00:02:39.87, start: 0.007500, bitrate: 143 kb/s
     Stream #0:0(eng): Audio: opus, 48000 Hz, stereo, fltp
       encoder : Lavf58.29.100

Command: file "OPUS_AUDIO.opus"

OPUS_AUDIO.opus: Ogg data, Opus audio,

M4A (size 2.6 MB):

Command: ffprobe -i "M4A_AUDIO.m4a"

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'M4A_AUDIO.m4a':
     major_brand : isom
     minor_version : 512
     compatible_brands: isomiso2mp41
     title : M4A_AUDIO
     artist : Artist
     date : 2022
     encoder : Lavf58.29.100
   Duration: 00:02:39.86, start: 0.000000, bitrate: 129 kb/s
     Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
     handler_name : ISO Media file produced by Google Inc.

Command: file "M4A_AUDIO.m4a"

M4A_AUDIO.m4a: ISO Media, MP4 Base Media v1 [IS0 14496-12:2003]

AAC (size 2.6 MB):

Command: ffprobe -i "AAC_AUDIO.aac"

[aac @ 0x564af8f33e40] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from 'AAC_AUDIO.aac':
   Duration: 00:02:24.10, bitrate: 144 kb/s
     Stream #0:0: Audio: aac (LC), 44100 Hz, stereo, fltp, 144 kb/s

Command: file "AAC_AUDIO.aac"

AAC_AUDIO.aac: MPEG ADTS, AAC, v4 LC, 44.1 kHz, stereo

  • The one nearest to source.
    – Tetsujin
    Commented Jul 25, 2022 at 16:06

1 Answer 1


This chart https://opus-codec.org/comparison/ shows that above 128 kb/s opus, aac and mp3 are very close in terms of quality.

So, as @Tetsujin mentions, the best one would be the one that is closest to the source

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