Sound problems with TM6900HD

[Lbutler20]

I have a problem that I cannot seen to resolve, on BBC channels I have perfect sound syncronisation at any time, but with Channel 4HD the sound is syncronised on startup, but gradually falls to 1-2 seconds behind picture. All Non HD channels are fine. Does anyone else have these issues and any recommendation for resolving them please?

[cactikid]

do you have any other ch4 hd channels listed,maybe try them as some scans bring up same channel on different frequencies,or check the audio button and select a different stream.

[Lbutler20]

Thanks for the tip, but since looking recently I find that C4HD has disappeared altogether, does anyone know where it has gone?

[bazeratus]

hd audio

i didnt get any sound from hd channels at one point try the audio button language setting s change them about, might help