[sdiy] Pitched Noise/VCO Bank Schematic Posted

[Theo]

Interesting, a 606 cymbal noise circuit with added RM + CV.
(give credit where due ;^p )

Think I did something generating similar sounds in ?DSP? (on Atari ST, not
real-time..)
First generating narrow noise band samples
(recursive additive method using a sine table,
calculate freq= center freq + tri-lfo on each sine period start,
write output so a cyclic sample buffer,
run longer = higher noise density).
Next use those noise band samples as the "partials" for normal additive
synthesis.
My results where less "lively" than yours though and needed some chorus or
phasing to live-, err make that scare-up.

Cheers,
Theo



----- Original Message -----
From: Scott Stites <scottnoanh at peoplepc.com>
To: synth diy <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, April 14, 2004 6:12 AM
Subject: [sdiy] Pitched Noise/VCO Bank Schematic Posted


> Hi List,
>
> As promised, I've posted the schematic of the 40106/4070 VCO Bank/Pitched
> noise circuit *as it appears on my breadboard* - let me qualify that - it
> was a case of limited breadboard real estate combined with a "wonder what
it
> would sound like if I did this" mentality, and is not how I would
implement
> it for a module (at least the CV portion).  So, no guffaws from the
> bleachers, especially when you see how I decreased the sensitivity of the
CV
> in.
>
> There are several obvious ways it could be improved (10M resistors in
> parallel with the VTL5C2 resistors would be a nice start - or using series
> resistance instead of parallel).  Also if one were to - Bissell!  Turn
> around and sit up straight, young man!
>
> As I was saying, if one were to put in pots to tune the various stages or
> use some other CV control scheme, it may be a neat way of using it as a
> 'drone' bank as was discussed earlier on this list.  I'd be interested to
> know if there were some economical/expedient way to smooth out the square
> waves.  In that case, one could plunk in one of those fancy quad four
> quadrant multiplier packages in for some fairly cool effects.  It's really
> just a - I saw that, Mahoney!  I've got my eye on you...
>
> Uh, I think it would be a nice launching point for various applications.
>
> I did get the oscillator bank design from Tom Henry's 'Noise Generator
> Cookbook', and he did give me permission to put it up in this schematic,
> though he hasn't really seen it yet.....he may very well see it and say
> "Pull that @#$!! thing off the net NOW!  Oh my God, I'm ruined."   =-D
>
> It's at the top of my Birth of a Synth page here:
>
> http://mypeoplepc.com/members/scottnoanh/slsdiy/id18.html
>
> Cheers,
> Scott
>
>