@fredrik222 Interesting thread It appears Quobuz is using a either a network protocol or an application technique that will try to dump as much data down initially (which probably works really well for short pop & jazz songs) allowing an instant start of the song and then giving a slower network the time to download the rest while playing the beginning of the song.
For most pop songs, it's seems like that initial chunk may contain the entire song.
It would be interesting to see what happens if he tried to play a long song to see if the data rate stays high even after playing the song starts.