Peter S. Lakanen asked about using Csound to emulate a TB-303.

I have corresponded with a few people about this - to say that it 
would be a very difficult project.  The starting point is to get a 
TB-303 and study the schematic. Then use an oscilloscope and your 
ears to find out what is happening - particularly in the accent sweep 
circuit and the two envelope generators.

I do not know how to model the behaviour of the diode ladder filter, 
and don't know of anyone who does - they are not textbook perfect 
filters.

While I understand the TB-303 as well as anyone, because of my Devil 
Fish modification work, (see my WWW site for full info) and while I 
am up-to-speed with Csound, including writing my own ugens, I would 
attempt a TB-303 emulation with trepidation.

If you can't work with a machine, schematics and oscilloscope, then 
you won't be able to do a really accurate emulation.

Much better then to work with Csound to produce your attempt at an 
emulation of whatever you think the TB-303 is.  This will lead to 
much more interesting and novel results than a slavish engineering 
based approach.


- Robin

. Robin Whittle                                               .
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