On Mon, 11 Feb 2002, Jeffrey Pontius wrote:
> (1) Just taking my first look at the motm-480 panel, noticing the BP and
> LP outputs. Is the configuration of this filter as follows: audio enters
> the low pass filter first (so is available for output) and then the low
> pass filtered audio enters the high pass filter (so audio is now band pass
> filtered)? Hence, this is the reason that a high pass output is not
> available. If so, seems like a similar audio setup to the Korg MS20 filter
> section (though different filter designs, I assume).
The CS filter is made up of two 2-pole state-variable filters with
open-loop gain limiting for each integrator and for the resonance
feedback. The first filter is high-pass and the second filter is
low-pass.
THe input signals go into the first filter. The BP output jack is from
the FIRST filter. This output exists on the IG00156 filter chip as used
by CS machines, but is not used. The high-pass output of the first filter
is hardwired to the input of the second filter. The LP jack is the
lowpass output of the SECOND filter. This is the stock CS configuration.
Input -> SVF1 (HP) -> SVF2 (LP) -> LP jack
|
(BP) -> BP jack
Crow
/∗∗/