Wiardgroup

Hi Mike,

I'll try to answer your questions. Let me know if I've erred.

>- Do the Borg filters self-oscillate (individually or in series?)

Yes and yes. And they can get very resonant before the onset of 
oscillation. Beautiful filter, and slightly schizophonic in nature. 
Buttery smooth as a VCA, squelchy and present as resonance is brought 
in.

>- Do the Borg filters process DC signals? What are the ranges of
>the Fcs?

Yes on DC signals. FC ranges from near DC to a probably a little under 18k.

>- What are the frequency ranges for the LFOs on the Borg filter?

Mine are about a minute to 20hz in low mode, and 20hz to around 16k 
when the switch is in high mode.

>Are they CV or controlled solely via the associated Osc knobs?

No, the top FC jack is cv in for the LFO. Then there's a 1v/oct and 
attenuated FC in for the filter section.

>- I have heard that the Envelator can be set to linear response via
>a PCB jumper or setting,

I believe you are thinking of the Classic VCO and Waveform City 
internal envelopes, which are switchable between lin and exp. The 
Envelator is linear by default, and the slope is bendable by using 
positive or negative feedback. Coupled with the pannable mixolator 
response, many varied attack and release characteristics can be 
achieved.

>- The Envelator does not appear to have feedback wired up on
>the Amod and Dmod input jacks,

This is a simple normalization procedure using the rear of the 
jackboard and  can be performed in no time. I'm sure Grant would do 
this for module orders.

>- The Start-up patch sheet indicates that on the Classic VCO, the
>osc pulse output fires the S/H; is this an interrupting jack for
>external clocking of the S/H so that it may be gated from external
>sources?

No. This requires a minor mod. I was going to do this to my first 
oscillator, but the WoggleBug sort of negates the need for this mod 
by giving you two clockable random generators. Still, it can be done.

The bank select cv in mod on the WaveForm City is stupidly simple.

Michael