Highly compressed AAC. Answers on Quora say about 48kb/s of bandwidth, so equivalent to about a 96kb/s MP3, which sounds about right. Bandwidth allocation is p

Highly compressed AAC. Answers on Quora say about 48kb/s of bandwidth, so equivalent to about a 96kb/s MP3, which sounds about right. Bandwidth allocation is per channel, talk only channels are even worse and some words are barely comprehensible.