I have tried using the a-pc command, this works for 10 min at a time. I will try some other commands this weekend.
I got A-PC working from the link room - tried it several times, and on the current test we are up to song five, so well past your 10 minute experience.
I prefer using N-MUSIC to A-PC simply because then LinkPlayer sends the track data to my BeoSound 4's display
I am still convinced there was a B&O update for broadcasting digital sound on the MasterLink but I can't find that thread