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Subject: Mother of All Bandpass?

From: "Paul Schreiber" <synth1@...
Date: 1999-05-14

The current design of the '410 filter has the LFO ouputs running "in
parallel" to all
three filters. They are equally summed, so there is a MASTER depth, but no
individual DEPTH. All filters move the same amount (they just have different
center freqs).

PROPOSAL (this will make Dave happy!)

Go to a 3U wide.

Replace the LFO DEPTH pot with 3 individual DEPTH pots.

Add 3 LEDs. The LEDs are analog. The brighter they glow, the higher that
associated bandpass filter frequency is (no bitching if this seems
"backwards". )
The LEDs would pulsate at that filter's LFO rate. (in German: "Das Lites

Add LFO OUT jack for other module fun.

Added kit cost $30-$40. We are now in the $229 kit arena.

Another way: 3 slightly different summing resitotors (narrow, mediium, wide
sweep). Free.


Paul S.