3 intro => 'Comparison of audio compression formats.',
6 name => '<abbr title="MPEG-1 Audio Layer III">MP3</abbr>',
21 name => '<abbr title="Advanced Audio Coding">AAC</abbr>',
26 name => '<abbr title="Adaptive Transform Acoustic Coding">ATRAC</abbr>',
33 mime => 'audio/musepack',
40 children => [qw( quality limits royalties support )],
43 name => 'compression quality',
44 children => [qw( quality_music quality_speech quality_ll )],
74 children => [qw( channels bitrate latency peeling )],
80 mp3 => [3, 6, 'stereo, extended to upto 5.1'],
86 name => 'bitrate peeling',
88 vorbis => [3, undef, 'yes but "unusable" quality'],
95 name => 'frame size (ms)',
97 mp3 => [3, 26, 'typical version and layer has 1152 samples at 44kHz'],
102 name => 'minimal bitrate',
110 name => 'Streamable',
116 name => 'Fast seeking',
118 mpc => [5, undef, 'indexed'],
119 opus => [3, undef, 'bisection seeking (usually 1 physical seek required if implemented correctly)'],
124 mp3 => [5, undef, 'expired'],
126 opus => [4, undef, 'open and free design'],
127 atrac => [2, undef, 'proprietary, but the original patents have expired'],
128 mpc => [5, undef, 'open format, bsd licensed implementation'],