[sdiy] Low Pass Gate is soooOOOOooo sweet

[Michael Ruberto]

Peter,

>I'm not sure about A.  N and O are ground,  One was 'clean" one was 'noisy"

ok this makes a little more sense now.

>which he needed for the computer control.  I lumped the N and O as ground,
>worked. If logically A seems like it's a ground connection, then i surely
>is.  The 292 C version was in Music Easel, and there are so many signals
>that go from board to board, it's hard to trace out where they originate.

yes, I am aquainted with Charles Cohen, who has been performing with a Music 
Easel for decades, and there are ALOT of connections in it. I dread the day 
he asks me to fix it :-(

>I'm sure you've noticed that, too.
>
>I always try to remember that Don Buchla was an acid head.  He was probably
>totally wacked much of the time he drew these things!!


LMAO!!! if he was an acid head then after making repairs to one of his 
systems I am afraid to know what drugs Serge did. those guys at Sequential 
were at least pot-heads, ever look at the interesting characters etched into 
their PCBs?

~M

>
>
> > hi,
> >
> > referring to the 292c, in this design I am assuming all the connections 
>with
> > the designation "a" are grounds, is this correct? then I also see
> > connections labeled "N" and "0". this sort of thing can be a bit 
>misleading.
> > can somebody clear this up a bit?
> > also, what's the story with the little extra circuits on the upper right
> > side of the drawing?
> >
> > ~M
> >
> >
> >> From: Peter Grenader <petergrenader at mksound.com>
> >> To: <synth-diy at dropmix.xs4all.nl>
> >> Subject: [sdiy] Low Pass Gate is soooOOOOooo sweet
> >> Date: Tue, 07 May 2002 20:41:45 -0600
> >>
> >> Gentlemen and lady (hello to Cynthia),
> >>
> >> I need to open by saying Mark Verbos is the most helpful and patient 
>guy in
> >> Europe.   I owe him my liver.
> >>
> >> Secondly, I've built now three low pass gates which closely resemble 
>those
> >> of THE modern day underworld God of instrument design himself, who's 
>name
> >> rhymes with 'Mooklah".
> >>
> >> Once I got the first one ironed out,(which had about a billion errors 
>in
> >> it,
> >> including some really really stupid component subs on my part), the 
>rest
> >> were a blink.
> >>
> >> About a second after I got them up I did a taste test against a 
>standard,
> >> non-vactrol based VCA. The verdict:  the Low Pass Gate is the sweetest
> >> sounding amplitude modifier ever conceived.  It's been 22 years since 
>I've
> >> snuggled up to these things.  I had forgotten.  There is no comparison 
>for
> >> short envelopes.
> >>
> >> I suggest you all give it a try.  Build an LPG, buy a Borg filter and 
>get
> >> with it the best-sounding multimode filter to hit the pyke in a decade 
>(my
> >> opinion), or wait until the mystery mods start showing up by Mr. 
>Mooklah
> >> himself - but get your hands on one of these things.
> >>
> >> If you're as dangerous with a soldering iron in your hand like I am, 
>you
> >> might consider replacing the 7.5 supply/SPDT switch/ 4016 analog switch
> >> combo Mark suggests with a singular TPDT switch.  Saves you from 
>worrying
> >> about the regulated supply and the wiring of the CMOS part altogether.  
>I
> >> did this on the last 2 and it was in fact a lot easier.  Another 
>warning -
> >> there are some unexpected twists and turns in Mr. Mook's schematic 
>layouts.
> >> The op amp ins are reversed from where you would expect them to be.  Go 
>by
> >> the pin-outs, you be good.
> >>
> >> Get an LPG, you be REAL good.
> >
> >
> >
> >
> > _________________________________________________________________
> > Chat with friends online, try MSN Messenger: http://messenger.msn.com
> >
>
>




_________________________________________________________________
Join the world’s largest e-mail service with MSN Hotmail. 
http://www.hotmail.com