MOTM

I was wondering if there are any plans in the works for a pulse divider 
module. Something with independent outputs for each odd/even division. Also 
are there any plans for "utility modules" (envelope followers, comparators, 
inverters, multi-output variable dc voltage sources, triggers with delay, 
logic function panels and anything that might be found on an analog 
computer). These modules are the 'meat and potatoes' needed to feed my patch 
madness. If anyone is building stuff like this I'd like to hear about it, 
perhaps even buy these items if you are selling. More than likely though it 
seems I'll have to be the one building this stuff custom for myself. 
I'd like to hear more ideas that others have come across for "utility 
modules." I'd like to get my MOTM closer to having the flexibility of a 
Buchla or Serge.

Thanks guys in advance!

Peter B.




Why live striving for the zero crossing when seeing the RMS of life is much 
more fun?

On Thursday, December 6, 2001, at 02:54 PM, echophazer@... wrote:

> I was wondering if there are any plans in the works for a pulse divider
> module. Something with independent outputs for each odd/even division. 
> Also
> are there any plans for "utility modules" (envelope followers, 
> comparators,
> inverters, multi-output variable dc voltage sources, triggers with 
> delay,
> logic function panels and anything that might be found on an analog
> computer). These modules are the 'meat and potatoes' needed to feed my 
> patch
> madness.

Actually I was thinking about bring this up for a good micro module. I'd
love to see a logic module (AND, OR, XOR/inverted or normal). Something
like Juergen's VariLogic circuit:

http://home.t-online.de/home/jhaible/hjvarlog.gif

Another one would I would like to see and should be fairly cheap would
be a single width module with a variable DC source and a one or two
input DC mixer with bias:

Pots: DC Out, In1 Level, In2 level, DC bias (-5/+5)
Jacks: DC Out,In1, In2, Mix Out

Actually to make it even cheaper version you could leave off the 
independent
DC out, and drop a pot and jack. Of course I guess I've come full circle
back to the mixer discussion (sorry Paul). I just find myself needing to
bias a lot of waveforms lately.

Another micro module someone brought up a long time ago, and I thought 
was
pretty neat; an effects send. Basically two circuits; MOTM-level to line 
level,
and line level to MOTM level. Need stereo, add two.


Tomy

hello all
hello pb (another one)

there's a very simple diy pulse/clock divider circuit at the following
address

http://ourworld.compuserve.com/homepages/the_analog_cottage/homepage.htm

it was the first diy module i ever built - and it'll hold you in good stead
until the MOTMxx0 pulse divider shows up...

cheers
paul b

At 3:44 PM -0800 6/12/01, Thomas Hudson wrote:
>Another one would I would like to see and should be fairly cheap would
>be a single width module with a variable DC source and a one or two
>input DC mixer with bias:
>
>Pots: DC Out, In1 Level, In2 level, DC bias (-5/+5)
>Jacks: DC Out,In1, In2, Mix Out
>
>Actually to make it even cheaper version you could leave off the
>independent
>DC out, and drop a pot and jack. Of course I guess I've come full circle
>back to the mixer discussion (sorry Paul). I just find myself needing to
>bias a lot of waveforms lately.

This is a good idea. I'd also like to see the inputs have +/- so that 
we can both invert, scale, and bias in one go (in that order). 
Something that comes up all too often, for me, is the need to invert 
a triangle, then scale it from +5/-5 to +5/0.

-- 
------------------------------------------------------------------------
Scott Juskiw 
scott@...

At 5:54 PM -0500 12/06/01, echophazer@... wrote:
>
>I was wondering if there are any plans in the works for a pulse divider
>module. Something with independent outputs for each odd/even division.

I often ask myself the same thing ;)

>Also are there any plans for "utility modules" (envelope followers,

Paul has a THAT-based envelope follower in the works.  I have high hopes
for it -- up until this point, no other envelope follower has used that
level of technology.

>comparators, inverters, multi-output variable dc voltage sources,

The Oakley Multimix has a very nice UI.  I have one with a 1U Stooge panel.
It can be used as an AC/DC mixer, inverter, scaler, DC source etc.  For
myself, I like it much better than Paul's proposed micro mixer interface.
It's very flexible -- similar to a Serge signal processor.  However, the
Oakley does have room for improvement on the inside.  It could use more
bypass caps and provisions for shielded cable.  I decided to unpopulate the
"capacitive load drivers" on mine, and used the OP275 which is already
designed drive shielded cable.  It's DC specs are decent (offset of a few
hundred uV), but not quite good enough to control VCO's.  You could use
LT1013's instead (60uV voltage offset), but they're bad for audio.

Otoh, according to the MOTM website, the 830 has excellent DC and audio
specs, with a DC offset <1uV (?!?) suitable to control VCO's. (Although it
worries me that its author says TL072 designs are "OK" for audio ;) It also
has an adjustable DC bias source.  If it used insert cables for the reverse
attenuators (afaik, only the 850 has a TRS jack) it would be far better
than both the Serge and the Oakley in every situation, but it doesn't.  So
there is a trade-off between quality and flexibility.

>triggers with delay, logic function panels and anything that might
>be found on an analog computer).
>If anyone is building stuff like this I'd like to hear about it,
>perhaps even buy these items if you are selling. More than likely though it
>seems I'll have to be the one building this stuff custom for myself.

Perhaps you should get on sdiy -- it's back up.