[mythtv-users] PVR-350 & 500 in same box, sound issues

[Intense Red]

   I have a PVR-350 in my system which worked fine with the PVR-350's hardware 
decoder.  The only "problem" was that MythTV is so slick TV watching has 
increased and 1 tuner was not enough. :-)

   So I added a PVR-500 to the box.  The system is a combo frontend/backend 
which outputs to the TV using the PVR-350's TV out, and it also serves as a 
backend to a couple of computers in the house.

   Adding the PVR-500 was no problem -- drop it in, IVTV found it 
automagically, and I added the 2 tuners (etc.) to mythtv-setup and all works 
well.  Well, all except the local TV sound (remote frontends work just fine).

   If I turn off the "Use the PVR-350's TV out / MPEG decoder" setting in the 
frontend, both video and sound work fine.  Sound comes out of the TV like it 
should.  If I turn on the "Use the PVR-350's TV out / MPEG decoder", I get 
video but no sound.

   Can anyone whack me with a clue-bat?

   On a semi-related note, MythTV seems to grab whichever one of the 3 tuners 
it wants to record things.  What I'd like to do is to "reserve" the PVR-350 
for live TV, and to have Myth do recordings only off from the 2 PVR-500's 
tuners.  Is this possible?

 Thanks in advance.

-- 
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 Because 31 oct = 25 dec.