Listen to msx.rocks using the links below.
A media browser supporting MP3 or AAC High Efficiency is needed. If you need one, VLC is the standard choice for many and runs on just about anything.
MP3 is the most widely supported audio codec out there. Efficiency isn't great, however.
AAC High Efficiency is a relatively newer codec, meaning efficiency is about as good as you can get. A more modern media player is needed.