Re: [Om-synth] splitting audio signals

[at0m|c]

Marc Wyburn wrote:
> Hi all, in an attempt to get to know Om I'm trying to build a
> emulation of a Moogerfooger Murf (input in split across several band
> pass filters in parrallel, which are in turn controlled via envelopes
> and a simple step sequencer).  I'm hooking up an audio input to a
> couple of bandpass filters and the sound dissappears.  Is this the
> correct behaviour or should I be using something to split the signal
> before passing it to the parrallel filters?  It's as if the filters
> are being applied in serial and since they are band pass and are set
> to different freq's I can't hear anything.  I've looked through some
> patches I found but none seem to do any parrallel processing.
>
> Hope this makes sense.
>
For splitting audio into frequency bands, you may want to try applying a
single filter, inverting the filtered signal and mixing it back with the
original.  Now the output of the filter and the output of that mix are 2
complementary parts, adding up to the original stream again.  You can
re-apply this technique to achieve multiple frequency bands...

Hope this helps!