[sdiy] VCO vote?

[Czech Martin]

Read this with some humor, but the background is really serious.

Every now and then some people tell us that this or the other
VCO sounds so much better then some other VCO.

I have no clue about that and thus want to learn more.

Did you listen to the VCO alone?
That would mean that you have to tap the VCO circuit.

Is there something special with the wave form?
That would mean to tap a scope in it (or sample it).

Is there some frequency oddity (jitter, phase noise, any way you
would like to name it.) That would mean to sample the output
and do some analysis on the timing (e.g. short time DFT, or
time domain period statistics).

Has such analysis been done?
If not, could people with "interesting" VCO come up with a good
sample (aka digital recording, DAT, no crap soundcard, please), 
16-bit 44100 or 48000, say 60 sec long of a low note ~100 Hz and a 
mid range note? (1kHz)?

Or is the "interesting" property such that it will get lost
during digital recording?

This mail is not intended to annoy people, but to learn more.

m.c.



-----Original Message-----
From: Rude 66 [mailto:r.lekx at chello.nl]
Sent: Mittwoch, 30. Juli 2003 00:24
To: Michael Ruberto; synth-diy at dropmix.xs4all.nl; Glen
Subject: Re: [sdiy] VCO vote?



of all the oscillators i have available, the one i like the best is the one
in the roland sh-09. that thing sounds just right. fat, sharp, musical.. the
saw cuts like a razor blade, the pulse with a little pwm easily outdoes a 4
oscillator mono poly. i know it's not very eccentric, but to me that's a
beauty. and discrete too, if i'm not mistaken.

the 'weirdest' one would be eric's metasonix tm-3. but boy,what a sound.. i
love the way you can make the oscillators beat together. but building tube
vco's is not for the fainthearted..;-)

r./




----- Original Message -----
From: "Glen" <mclilith at charter.net>
To: "Michael Ruberto" <frankentron at hotmail.com>;
<synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, July 30, 2003 12:06 AM
Subject: Re: [sdiy] VCO vote?


> At 05:51 PM 7/29/03 , Michael Ruberto wrote:
>
> >I hate to be a cheerleader but can we have a best VCO vote?
>
> Will we be using punch cards?  :)
>
> Actually, I'd be interested in this also. If not a vote, maybe some people
> could write a few comparisons between different VCO's. I need to build a
> few VCO's, and start building an analog synth. Comparisons between
> different VCO designs I see on the internet might be helpful.
>
>
> >PS: would it be redundent to build a synth with like a dozen waveshaping
> >modules?
>
> Only if they were the same type of waveshaping modules.  :)
>
>
> later,
> Glen Berry