[sdiy] analogue physical modelling organ dream

[jhaible at debitel.net]

Zitat von anthony <aankrom at bluemarble.net>:

> >I have approx. fifty  512-stage BBDs, so I could build 4 octaves of a fully
> > polyphonic
> 
> Are you still using the same setup that's on your page?

This one: http://home.debitel.net/user/jhaible/jh_ana_phys_mod.html ?
No. The Storm Tide doesn't really track well enough.
I built a better delay line, and tried less complex nonlinearity
and filter circuits. (As opposed to the waveshaper and Buchla Gate
I had used to create the mp3's on my web site.)
But the results are not encouraging. Not at all. I probably have to go 
back to my first experiments and check what settings really brought
the good results.


> I think it sounds kind of cool, kind of a creepy and psychotic flute.

I had hoped to get something like that flute wuth the new setup. But sadly, 
it's not even close so far.


> I'm using a Radio-Shack "reverb" for my test-bed (opened up with a small 
> solderless breadboard on it).
> It's a MN3207 thing, but it's handy for trying different weird things. The 
> effect I get from putting too much gain in the feedback loop is pretty 
> non-linear (I put a big pot there). I like the tone it gives - kind of like 
> an E-string dropped to D. 

Sounds interesting. Have you made any samples?


> But the pitch it gives can be unstable and if you 
> shift up and then down there is some hysteresis. Are these the kinds of 
> problems you're talking about?

I didn't have any hysteresis - just non-optimal tracking.
But of course I only get the "right" pitch (_when_ I get it at all)
at some specific parameter set. When the system is just at the edge
of oscillation, or between modes, the pitch does strange things. But
that's normal. A trumpet does this, too, I've been told.

JH.

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