Hi!
there are some channels using aac for audio. I.e. SABC1 at 23.5°East 10758 V 22000 8/9 DVB-S2 Seems vdr doesn't support aac as no pid is entered neither for apid nor for ddpid. I think xine should support acc or doesn't it? So it should be no big deal do extend vdr to support aac.
kind regards
Newspaperman