Wiardgroup

On Sat, 04 Jan 2003 02:53:50 -0000 "grantrichter2001 <grichter@asapnet.net>"
<grichter@asapnet.net> wrote:
> The Wiard Classic VCO and Waveform City modules
> contain 
> circuits with knobs labeled Attack and Release.
> In the case 
> where the Gate input is fed a clean 0 to 10
> volt gate signal, the 
> output of the circuit will look like an Attack
> and Release envelope.
> 
> This is not and actual envelope generator, but
> a bi-directional 
> slew rate limiter. Labeling it like an envelope
> has caused some 
> confusion.

As a quick aside - this is a very useful
feature in certain applications.
Specifically, I run the output of a drum trigger
pad into the gate input, with the EG set for
minimum (or close-to-minimum) attack time.  The
output of the envelope is then velocity-
sensitive, since a heavy hit to the pad sends
a higher voltage into the gate than a light
hit does.

> An actual envelope generator would have an
> input comparator 
> that forces the envelope ouput to 10 volts, no
> matter what the 
> input Gate voltage. The installed circuit does
> NOT have this 
> comparator.

But the envelator EG's do, which makes them
less useful for the application I just
described.  I greatly appreciate the fact
that a complete Wiard system has *both*
kinds of envelopes.

(And playing the Wiard with a drum kit as the
UI is fun fun fun!)

    -Doug
     jasret@mindspring.com