[sdiy] function generation

[James Patchell]

The 8038 is generally only suitable for pitch non-critical 
applications....in other words, not suitable for your main VCO.  The Terry 
Michael's (ASM-1) vco core is much more suitable for pitch 
generations.  However, there is nothing wrong with using the 8038 in other 
oscialtor applications.  You just have to keep in mind that it is not easy 
to make it an exponential oscillator.

Also the XR2207, XR2206 and several other IC oscillators are not suitable 
for pitch sources either.  The only IC oscillator chips that were made that 
will work as pitch sources are the Curtis 3340 (and derivatives) (out of 
production, by the way) and the SSM ...what was that now...the SSM2030 I 
think (also out of production).


At 08:42 AM 11/8/2003 -0800, Luciano Hormazabal wrote:
>what do you think of making a vco out of a function generator such as the 
>8038 integrated circit or any, for that matter. are they accurate?? why 
>haven't i seen things built based on that kind of i.c.??? or am i wrong 
>and most use them?? in that case, which function generator is good??
>
>
>thanks for your help.
>
>
>
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         -Jim
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