[mythtv-users] Is it possible add delay to sound?

[IsmoT]

I bought new tv.

It has very long delay when it processes picture. I realised that sound 
is over 100ms ahead picture.
I have A/V Amplifier connected to my pc with digital coaxial cable. TV 
is connected with dvi-hdmi cable.

I can add up to 80ms delay from amplifier, but it is not enought. I can 
also reduce picture processing time if I select "PC-mode" from tv, but 
after that motion looks horrible. I have also tried to take off all 
picture processing options from tv, but I need to keep "Film mode" on, 
that picture looks good.

So, is it possible to add delay to sound from alsa configuration? I 
don't have pulseaudio, since I use minimyth. It also has no graphical 
desktop.

Myth seems to have sound syncronisation in osd, but it does not affect 
at all. I assume it does not work with digital sound output?

Regards, Kane