Well I hope that Spotify on Android does send original AAC to devices which support it too, but more general point is that you need support on both sides. Somet

Well I hope that Spotify on Android does send original AAC to devices which support it too, but more general point is that you need support on both sides. Something has to decode that AAC on the receiving end, otherwise you'll get standard codecs which are crap (or rather their implementations). People discuss it without those terms and come to different conclusions, e.g. most like when you use a mic you switch codecs, 99% sure.