[User 186112]

Quoting popcornmix:

When not using passthough, this has quite a significant performance benefit for me. I can reduce arm clock significantly before a stream starts buffering.
It also starts to make TrueHD audio usable (some TrueHD streams are playing correctly with overclock whereas before it was impossible).

You can get test TrueHD streams here:
http://www.demo-world.eu/trailers/high-d...ailers.php

There is a chance this could cause audio glitches or sync problems, but it's behaving for my test streams.

TrueHD is still problematic. In a standalone test AC3 takes about 17% of the (stock frequency) ARM's CPU. TrueHD takes about 57%, so it's much more expensive.
We've got Ben to look at optimising the codec. It will always be worse than AC3/DTS, but in conjunction with this patch it may become feasible to play TrueHD on an overclocked Pi.

So does this mean we can passthrough or decode TrueHD 5.1 with our Raspberry Pi's soon? That would be awesome! Great job!