Opus vs Vorbis vs MP3 vs AAC vs AC3 vs MP2 - Audio CoDecs at low bitrates
7different audio codecs at low bitrate
all of the samples are in stereo
The source file is a 44100hz s16 FLAC (Free Lossless Audio Codec)
All of the codec samples were coded using this source file as input
Remember since this is on youtube, youtube does code all the audio again.
This creates what is known as "generation loss". Fortunately the youtube's audio quality is high enough for this demonstration.
the song is by Wolfgang Amadeus Mozart
the work was made in the 1700's, so it is in the public domain under USA copyright law, and is therefore free for anyone to use.
0:00 FLAC source file
1:00 48kbps opus
2:00 48kbps vorbis
3:00 48kbps mp3
4:00 48kbps mp2
5:00 48kbps ac3
6:00 48kbps aac
7:00 32kbps opus
8:00 32kbps mp3
9:00 32kbps ac3
10:00 32kbps aac
11:00 16kbps opus
12:00 16kbps aac
13:00 8kbps opus
14:00 8kbps aac