Wiardgroup

A bunch of you will be getting your Boogie Filters next week.

Here are some operating notes:

This is an extension of the Lowpass Gate technology using a 
Butterworth circuit instead of a Sallen-Key. But it is still a gate, 
and goes all the way off. You can use it like a combo VCF-VCA. 
The Frequency control range is very wide, from off to 20 kHz. The 
wide range is to accomodate using the 6 dB/Oct output like a 
VCA. It will gate either audio or control voltages.

You can use it like a Mini-Moog type filter, in addition to using it 
like a Lowpass Gate.

With high levels of resonance, the filter will produce distortion at 
the cutoff frequency. This is useful for processing tracks.

The red jumpers on the back control the phase of the 12 and 24 
dB/octave outputs. In the bottom position, the phase is inverted. 
In the top position, the phase is positive. When mixing the 
different outputs, the inverted phase allows the Matrix 12 type 
responses. If you move them to the top position, you can use a 
JAG and 4 VCAs to make a variable slope filter.

Have fun!