[sdiy] jitter, warmth, and so on

[Antti Huovilainen]

On Fri, 21 Apr 2006, John Mahoney wrote:

> I was just hoping that we could start somewhere. I was just out this lump of 
> clay to see if the group can mold it into shape. Any ideas on how we should 
> audition oscillators?

That's a good question. I've had some ideas about tapping two oscillator 
outputs directly and recording 5-15 mins per note at different octaves to 
computer and then analyzing the beating (I mentioned earlier that I have 
code that can get ridiculously high frequency resolution from normal 44khz 
recordings of sawtooth).
I had some test recordings of single oscillator from Pro-One, but the 
drift was totally dominated by the fact that the owner took a shower 
around the 7 minute point :). This is where recording the oscillators 
separately but simultaneously would help as any common frequency drift 
(which is below audible threshold) could be cancelled leaving only that 
drift which affects beating.

> Is it useless to listen to single, naked oscillators? I didn't say that

No, but it will not tell as much as you'd initially think.

> people couldn't process the osc samples through analog filters and VCAs.

I think tapping the oscillator output directly is a must if any kind of 
reliable and quantifiable _oscillator_ analysis is to be done.

>> "No boom today. Boom tomorrow. There's always a boom tomorrow"
>>   -- Lt. Cmdr. Ivanova
> I've long wondered where your .sig quote comes from.

Babylon 5

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova