[sdiy] Starting my ASM-1

[David Reichert]

Also, I've thought about this for a while: couldn't one build a CV
keyboard with one set of switches rather easily?

This could be done by building the CV part using a current source and
voltage divider, like the Formant. Then, taking a voltage lower than the
lowest CV on the keyboard (e.g., lowest out is 1.5V, use 1V) and use
that as the reference voltage on a comparator, and compare that with the
CV output from the keyboard, thus sending a gate signal from the
comparator when a key is hit?

Now of course being a newbee, I may be completely wrong and you're all
having a good laugh at my expense, but I personally can't see a hole in
my logic. Of course, I haven't actually tested my theory. If someone
knows why this wouldn't work, please tell.

-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Magnus Danielson
Sent: Friday, January 11, 2002 5:41 PM
To: ijfritz at earthlink.net
Cc: rmantel at nitline.net; synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Starting my ASM-1

From: Ian Fritz <ijfritz at earthlink.net>
Subject: Re: [sdiy] Starting my ASM-1
Date: Thu, 10 Jan 2002 22:30:58 -0700

> At 08:18 PM 1/10/2002, Rob Mantel wrote:
> >I built the formant keyboard years ago, and to be honest, I would
never do
> >it again. A lot of those keyboards, like the formant one, use double
> >contacts for each key (one for the cv, one for the gate), its a pain
to keep
> >those contacts work reliable and trigger both at exactly the same
time over
> >the years.  So if you want to build your own, try to find something
that
> >only uses 1 contact per key, but unless you can find the right
schematics,
> >it won't be easy to have a keyboard that you can play both with and
without
> >triggering a new gate pulse when you play the keys legato. There
might be an
> >easy solution for this, but I don't know it.
> 
> 
> See EN #67 (12)   :)
> 

Does that really help anybody? I don't think so... the ElectroNotes are
not on the web (except one I think) and not many really has them, and
certainly not a newbee...

For a newbee that line is hidden in deep cryptology except maybe for
the smilee and the first word.

Cheers,
Magnus - have a sense of humor, but don't think it applies in this case