More 909 questions.... :-)

[WeAreAs1 at aol.com]

In a message dated 1/25/00 2:01:51 PM, you wrote:

<<the hand clap circuit uses an AN6912, a quad opamp chip. Again is

there anything special about this part, or again could I use a TL074?>>

It's actually a quad comparator chip.  I don't think the AN6912 can be used 
as a regular linear opamp.  A quad opamp might work, but it would probably be 
better to substitute an LM339 quad comparator for its function.  Check the 
pinout, though - it might be different.

BTW, you might consider adding the extra controls that Roland put in their 
HC-2 Handclapper pedal.  It's basically the same 808/909 handclap circuit, 
but has a couple of useful knobs for tweaking the sound.  I can email you a 
schematic, if you'd like.

Michael Bacich