[sdiy] Decay

[Rönnberg Niklas]

Well that's right, but that pot also controls the Q value and the feed back
(right?). I would like to use the same incomming trigg pulse to control a
similar circuit as well as a simple VCA (that is a CA3080). So I do need to
add a decay contol on the input stage (right?). My idea is to make a snare
drum like circuit consisting of one drum tone (like the bas drum, but
higher pitched), a noise generator and a simple VCA. 

Are you following me? ("Stop with that or I will have you arrested!" And
the movie are?) Can you help me out?

Regards

/Niklas

And if you have forgotten the original circuit:
http://www.itn.liu.se/~nikro/diy/bassdrum.gif

-----Original Message-----
From:	Tim Ressel [mailto:madhun2001 at yahoo.com]
Sent:	Sat 5/29/2004 4:04 PM
To:	Rönnberg Niklas; synth-diy at dropmix.xs4all.nl
Cc:	
Subject:	Re: [sdiy] Decay
Yo,

--- Rönnberg_Niklas <nikro at itn.liu.se> wrote:
> Anyway, I'm planning to make more drums based on
> this design, but how do I
> add a pot so I can control the decay?

It looks like you already have one. The 100K pot that
feeds the output of the opamp back to the input should
adjust the ringing time of the twin-T filter, I think.

--TimR


	
		
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