[sdiy] FW: [Csnd] VCS3 GUI instrument

[Andy Main]

Hi all,

I was wondering if any of you could help this guy out.  He's basically
put a GUI on a csound interpretation of a VCS3 (it runs on csoundAV and
I can send it to you if you are interested), but he would like to extend
it to be like a synthi-ak (the touch sensitive portable one).  Can any
of you explain how this works - I would have thought it just provides a
simple 1V/oct CV output that you patch in on the pin-board.  Do any of
you guy's know any better?

Thanks.

Andy.

-----Original Message-----
From: Gabriel Maldonado [mailto:g.maldonado at inwind.it] 
Sent: 19 April 2003 15:56
To: csound at lists.bath.ac.uk
Subject: Re: [Csnd] VCS3 GUI instrument

My main question is: what the piano keyboard does in a real VCS3?

I have no difficulty on adding a new row in the matrix that adds a MIDI 
keyboard control signal generator, but I wanted to know the real way old

hardware vcs3s handled keyboards...

I noticed that the minimum level of oscillator's frequency knobs still 
generates too short periods (max 2 secs), so I tweaked the exp table in 
order to increase period to about 10 seconds. I will post these 
modification later...

BtW: at present time I run vcs3.csd at sr=44100 and ksmps=100, with this

configuration, my mobile athlon 2000+ cpu is busy for 60%.
I guess that most processing power is wasted in mixing audio signals 
(there are 16 mixers of 16 channels each, for a total of 256 channels 
always running).

btw2: I enabled the two audio inputs and the latency is very short with 
portaudio.

btw3: Here is the photo of the panel of a real Synthi-A, that is nothing

more than a portable VCS3

Gab

Andy Main wrote:
> I love it. Thanks Steven, and thanks Gabriel.  Anything else up your
> sleves?  When I have time (a few weeks away at least :() I'll have a
> look at adding more modules (=more possibilities).  That's if no one
> wants to have a go themselves in the meantime?
> 
> Andy.
> 
> -----Original Message-----
> From: Gabriel Maldonado [mailto:g.maldonado at inwind.it] 
> Sent: 19 April 2003 10:38
> To: csound at lists.bath.ac.uk
> Subject: Re: [Csnd] VCS3 GUI instrument
> 
> Here is the tweaked version of VCS3.csd
> These are the modifications:
> 
> - reduced the size of the main panel in order to display it in my 
> 1024x768 laptop screen. I also separated the snapshot stuff in another

> panel. I relocate the knobs of the filters in order to have all
controls
> 
> in the same line of knobs, and some other cosmetic stuff (try it under

> linux, maybe there are difference on the size of the fonts)
> 
> - added two knobs: the main volume knob and an overall amplitude
offset 
> knob. This allows a more effective amplitude modulation
> 
> - set sr = 44100 and kr = 100 (for less aliasing)
> 
> - commented the code lines of sync of osc2 and osc3 with osc1. I
really 
> don't know its utility, and affected the sound quality.
> 
> - removed the instr call from the pin matrix buttons, they were
useless 
> and make the sound distorted when clicking the buttons.
> 
> It now works exciting cool! It has the same interactive feeling of a 
> real synti-A. Enjoy!
> 
> Gab
> 
> 
> Ben McAllister wrote:
> 
>>Well great!  I'm glad to get feedback from everybody.
>>
>>Steven: I'd love to get ahold of any other modular designs you might 
>>have! ;)  Maybe some offline collaboration could happen?  It sounds
> 
> like 
> 
>>there is no REALTIME support in the works for OS9, but OSX is a 
>>possibility.  Those G3 cards are cheap if you don't have one already!
>>
>>Gabriel: Could you send me your changes as an attachment to 
>>benmca at drizzle.com?   Thanks - the formatting on hotmail (the account
> 
> I 
> 
>>use from work ;) completely screwed up the formatting.  I beat it with
> 
> 
>>vim for all the time I could muster yesterday, but, alas, not into 
>>submission.  It looks like the only changes you made were
>>
>><CsOptions>
>>
>>-+P -+I -f
>>
>></CsOptions>
>>
>>
>>and upping the sample rate to 44.1  - true?  Let me know if I missed 
>>anything.  Also, the snapshots DO work in Istvan Varga's Csound, so 
>>maybe there is something he implemented wrong.. there's a bug 
>>somewhere.  Can you tell I was an SDET for awhile?
>>
>>
>>
>>Anyone else:  does anyone have experience with the VCS3?  What did you
> 
> 
>>use it for?
>>I have mastered the "whooshies" on "on the run" from Dark Side of the 
>>Moon (you can see Water's playing it on the Live in Pompeii video, for
> 
> 
>>the geeks out there) and am ready to hear about other applications it 
>>has been put to.  There are tons of possibilies with that matrix.
> 
> Good 
> 
>>times...
>>
>>b
>>
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> 
> 
> 
>