SCWthrowaway1095

SCWthrowaway1095 t1_j1q5dda wrote

Yeah, Opus has a lot of neat little tricks under the hood that make it really good at sound compression, for both music and human voice. And it’s also open source! Youtube, Discord and Whatsapp all use it as their primary audio codec as far as I know, with youtube using it as part of the .ogg container.

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SCWthrowaway1095 t1_j1pi1oo wrote

It’s a great song for testing.

One of the things that makes the MP3 format good at compression is its ability to dynamically shift data between time and frequency. It can decide on the fly, at any given point in time, whether it wants to give more emphasis to percussion and transients or whether it wants to give more data to whistles and tones.

Tom’s Diner was probably chosen because it contains a good blended mix of sharp transients and long tones.

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