That's quite a leap from the previous high of 48kbps.
Just as it is with video, bitrate is one of the most important pieces of the puzzle for high quality audio playback. Sony just made a huge leap in that department, giving Music Unlimited listeners the ability to get 320kbps audio.
That change isn't live on every device yet, but Sony says it's on the way. Currently, PC, Mac, Xperia, Android and Android Walkman devices have all been given the new feature, as has the PlayStation 3. To change the audio, simply jump into the settings menu and switch on "high quality streaming."