Haven't heard audio problems either on TBS 6925 or Dr.HD F16, maybe AAC audio i.c.m. decoding codec causes a problem?
AS actually these channels are not as bad as you hope for! Video/audio quality is fine too.
I wonder now what beam this package, and CS link 12525V really are on.
Flysat thinks everything above 12500 is Europe beam (bad for most of UK).
For AS, 12525 V should be much weaker than everything else below 12500 .