MOTM

This will only work if there are *no* changes to the phase of the audio 
that's been filtered.  I think that some
of the interesting effects of some filters are due to phase changes in 
various frequency ranges, and how they
interact with each other.

But I just woke up, so...

-Geoff

Tkacs, Ken wrote:

> Invert the output of your LPF and mix it in equal proportions to the 
> original signal. The lowpass'd signal will cancel out the low portions 
> of the "dry" leaving higher frequencies.
>
>