[sdiy] drum accent circuit

[Dave Magnuson]

Hi everyone,

I'm cloning the DR-110 hi hat circuit, and I'd like to come up with a 
better way to generate accent.  The original thumps pretty loudly, and it 
has a single-supply output section.  I'd like something with better sound 
(no feedthrough), and a bipolar supply (to get rid of DC offset).

I've used photoshop to cut down the schematics to only the hats, accent 
circuit and output section.  You can find them here (250K pdf file):

http://www.hoohahrecords.com/resfreq/mods/dr110/dr110hh.pdf

Now, what I'm thinking is this:
Use a simple AD envelope generator (or fixed attack, variable decay) and a 
CA3080 based VCA.  I would bias the VCA so that it's always allowing signal 
to pass at approx 50% volume, then the env generator could add accent up to 
full volume.  Finally I'd use a TL071 or similar for driving the output.

Is this a typical way of approaching this, or is there some easier method 
that I'm overlooking?

thanks in advance,
Dave

Resonant Frequency:
resfreq at hoohahrecords.com
http://www.hoohahrecords.com/resfreq/index.html