JH's VCO, wavetable source
Grant Richter
grichter at execpc.com
Fri Jul 2 20:11:54 CEST 1999
I have to point out that the most elegant solution to
wavetable generators is an analog to digital converter.
A high frequency VCO clocking a counter, has no
advantages over an analog to digital converter
used as an address generator.
The use of the ADC gets you two additional operating modes,
namely arbitrary scale quantization and non-linear synthesis
(we recently hand traced the transfer functions of the Serge
Wave Multipliers into a wavetable, sounds the same but with
eight bit grunge).
Additionally the software to generate the 256 sample wavetables is
available for download with a shareware price of a measly $20.
http://www.wiard.com
>
> Well, anyway what I need is a sound source with a wavetable containig
> 256-times oversampled waveforms. This means that it either:
>
> 1) requires a VCO going linearly to megahertz (practically impossible,
> right ?)
> 2) requires sample droping at higher clocking rates. Not easy, since
> I would like the possibility to continously scale it several octaves
> down by pitch envelope, bend and for deep FM without hearable sampling
> artifacts.
>
> regards,
>
> mb
>
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