MOTM

> >> apart from the EFM boolean logic module, does anyone 
> know of any  
> other synth manufactuer who makes a similar thing (Emu 
> excepted) 

I'm not a synth manufacturer, but here's a little "VariLogic"
circuit of mine:
http://home.t-online.de/home/jhaible/hjvarlog.gif

It can be switched to AND, OR, XOR, NAND, NOR and XNOR with
one on/off/on switch and one on/on switch.

A simple INV fuction is possible, too, as the inputs are normalized.

Input A is normalized to "High", and you can connect a
simple footswitch here to provide one of the input signals.

The circuit works without a separate 5V supply, and it's quite
sturdy when it comes to overvoltage, ESD and so on (no CMOS
chips).

LEDs for inputs and outputs, of course.

JH.

At 04:26 PM 9/18/01 +0200, you wrote:

> > basically what does this type of module do ?
>
>Basically this (;->) :
>
> > >It can be switched to AND, OR, XOR, NAND, NOR and XNOR
>
>(These are boolean functions.)
>
>JH.

> sorry for dupes, i have been clumsy with email lately. and i dont' want to
> rekindle a shootout, but i think it's ridiculous that this list is set up
> to reply to the person who posted rather than the list itself.

Yes. Especially when I'm reading / replying from t-online's webmail.
It's hard to decide if I got a private mail or a list mail, so in doubt
I reply privately, in order not to offend anyone. Now that I see it on the
list,
feel free to forward my answer to the list, too.

JH.