FFDShow Tips and Tricks

For the fellow FFDShow users, share some of the neat things you've discovered over the years. I'll start off.

Surround sound matrix for 5.1 speaker systems in audio decoder:

http://img527.imageshack.us/img527/8229/matrixv2ib4.png

It works great for all the anime that's encoded in 2-channel sound.

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After much more rigorous testing, I've come up with a new one that has less distortion. Apparently the + and - signs aren't just straight addition like I originally thought.

http://img262.imageshack.us/img262/5198/matrixv3bs7.png