opus vs vorbis vs aac vs mp3 vs mp2 vs ac3 vs eac3 vs speex
2Pushing Audio Codecs To Their Limits.
The music is Wolfgang Amadeus Mozart - Marriage Of Figaro
I sourced the file from Musopen, who provide public domain music in digital form.
The specs of the original file is 24bit bit-depth and 48000hz samplerate lossless FLAC encoding.
I used this source file with ffmpeg to encode each individual audio clip to the various codecs and bitrates.
I then used ffmpeg to visualize them with the spectrum filter with cuberoot scale.
0:00:00 48 kbps opus
0:01:00 48 kbps vorbis
0:02:00 48 kbps mp3
0:03:00 48 kbps mp2
0:04:00 48 kbps eac3
0:05:00 48 kbps ac3
0:06:00 48 kbps aac
0:07:00 45 kbps speex
0:08:00 32 kbps opus
0:09:00 32 kbps vorbis
0:10:00 32 kbps speex
0:11:00 32 kbps mp3
0:12:00 32 kbps mp2
0:13:00 32 kbps eac3
0:14:00 32 kbps ac3
0:15:00 32 kbps aac
0:16:00 24 kbps opus
0:17:00 24 kbps vorbis
0:18:00 24 kbps speex
0:19:00 24 kbps aac
0:20:00 16 kbps opus
0:21:00 16 kbps vorbis
0:22:00 16 kbps speex
0:23:00 16 kbps aac
0:24:00 12 kbps opus
0:25:00 12 kbps vorbis
0:26:00 12 kbps speex
0:27:00 12 kbps aac
0:28:00 8 kbps opus
0:29:00 8 kbps speex
0:30:00 8 kbps aac
0:31:00 6 kbps opus
0:32:00 6 kbps speex
0:33:00 4 kbps opus
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