By the way,

Modular synth company URL's, from an article 
on modular analog synths from the April 2009 
issue of Sound On Sound-

http://www.electro-music.com/ 

http://www.synthtech.com/

http://www.cwejman.net/

http://www.tiptopaudio.com/

http://www.blacet.com/

http://www.doepfer.de/home.htm

http://www.livewire-synthesizers.com/

http://www.metalbox.com/

http://www.modcan.com/

http://www.cyndustries.com/

http://www.mattsonminimodular.com/

http://www.theharvestman.org/

http://www.synthesizers.com/

http://www.curetronic.com/curetrbau/curetr/index.htm

http://www.analoguesystems.com/

http://www.users.globalnet.co.uk/~concuss/

http://www.futuresoundsystems.co.nr/

http://www.technosaurus.ch/

http://www.paia.com/

http://www.ear-group.net/earhome.php

http://www.buchla.com/

http://www.motu.com/products/software/volta/view?searchterm=volta


Some cool stuff worth checking out.

Enjoy,
-Partev



=============================================================



--- encino_man@netscape.com wrote:

From: "Partev Barr Sarkissian" 
To: 
Subject: [Csnd]  Re: [ot]-Speaking of Hardware Synths (Vince Clarke Interview)
Date: Mon, 29 Mar 2010 19:58:19 -0700

Cool,...
I thought that Curtis/SSMT chip page was gone.
I was emailing Curtis about this site about a 
dozen years ago when I was at Alesis. Mike Peake
the engineer behind the A6 Andromeda, Stephan McCann
and I who were plucked from the service & repair to 
service the A6 were all analog module builder nuts,
so we were always going onto that site for stuff. 
Then that site went away or we couldn't find for a 
time. Now it's back, thanks for the link.

For one of the modules I'd build, I did mostly filters
work from Prophet-5 schematic and SSMT Apps notes
(written by Dave Rossum and Andrew Horner). I used an 
SSM2040 filter IC to build a 4th order State Varible
with maximum 18-24dB/oct roll-off rate. If I wanted 
to go more, I would band limit a little more to get 
some wildly steep roll-rates. It was stable, but now
and then I'd tweak it a little too far and it would
break into oscillation. I was having to put comp capacitors
all over the place (at strategic points so as to not 
affect performance). Quite a trick, quite a learning 
experience (circa 1979-1986). 

Interesting times. Now to try to apply all that in a
Csound environment.

Thanks ever so much,
Cheers,
-Partev


==============================================================



From:  	Rene Djack 
Reply-To:  	csound@lists.bath.ac.uk
To:  	csound@lists.bath.ac.uk
Subject:  	[Csnd] Re: Re: [ot]-Speaking of Hardware Synths (Vince Clarke Interview)
Date:  	Mon 03/29/10 12:12 AM

	 
Hi,

yes it is,

I have started from this

http://www.synthtech.com/cems.html

and found many documents on the net

http://www.timstinchcombe.co.uk/synth/synth_main.html

http://www.musicfromouterspace.com/analogsynth/vcf.html

https://ccrma.stanford.edu/~stilti/papers/moogvcf.pdf


Analog reality is not simple !
An other much faster way i have is to use the moogladder opcode.
A very nice opcode filter by Victor Lazzarini.

Best,
René




2010/3/29 Partev Barr Sarkissian 
OTA,... as in Operational Transconductance Amplifiers, as used in
(CV type) Voltage Controlled Elements (VCE)?

-PBS


=============================================================


From:   Rene Djack 
Reply-To:       csound@lists.bath.ac.uk
To:     csound@lists.bath.ac.uk
Subject:        [Csnd] Re: Re: [ot] - Speaking of Hardware Synths (Vince Clarke Interview)
Date:   Sat 03/27/10 11:18 PM

Hi,

I make a simple csd based on trivial OTA formulas,
but it is too simple ! It does not sound like my hardware filter.

May be i will inject sine signals to the hardware filter to measure the
amplitude and phase output for several setting of frequency cutoff and resonance.

A lot of work....


Best,
René





2010/3/28 Partev Barr Sarkissian 
My experience is that with hardware 4-pole filters, it's not a matter of being
hard to make, but it takes some work to keep them stable. Doing a 4-pole LP
Curtis,... I'll have to try that one. Got an orch/sco- file I can try out?

-Partev


===========================================


From:   Rene Djack 
Reply-To:       csound@lists.bath.ac.uk
To:     csound@lists.bath.ac.uk
Subject:        [Csnd] Re: Re: [ot] - Speaking of Hardware Synths (Vince Clarke Interview)
Date:   Thu 03/18/10 10:30 AM


Hi,

Thanks a lot for this video, it is wonderful.

I fan of Berlin school style music and Space music, all made with synths,
I don't know that Vince Clarke have a so huge collection of hardware synths.

I still have an old Sequential Circuits Six-Track 610 and i am trying to emulate it
with csound and Qutecsound.

Really not easy to make a csound 4 poles LP Curtis filter!!!

Cheers,
René


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