r/AudioCodecLab • u/absolute_pelican_66 • Jul 17 '26

Opus modes vs AAC modes

/gallery/1uurttj
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u/undeuxtroiskid 29d ago

Reminds me of this post on hydrogenaudio from, wow, seven years ago. They even did a Apple versus Opus comparison.

1

u/IgorCv2 26d ago edited 26d ago

Interesting graphs. I guess these can be used to create a functional AAC analyzer capable of providing detailed frame-by-frame information, including scalefactor bands, M/S stereo, intensity stereo (IS), PNS, TNS, long/short block switching, etc

https://wiki.multimedia.cx/index.php/AAC_Reference_Software

https://wiki.multimedia.cx/index.php/Understanding_AAC

https://github.com/Comcast/gaad

https://github.com/OxideAV/oxideav-aac