[sdiy] RE: Polyphonic synthesizer (controlling with vactrols)

[mikko.a.helin at nokia.com]

Here's some code for bandlimited oscillators from Timo Tossavainen:

http://www.cs.uta.fi/~tt/

-Mikko

> -----Original Message-----
> From: ext Andre Majorel [mailto:amajorel at teaser.fr]
> Sent: 22. April 2002 22:18
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] RE: Polyphonic synthesizer (controlling with
> vactrols)
> 
> 
> On 2002-04-22 18:10 +0300, mikko.a.helin at nokia.com wrote:
> 
> > Nice synth! I've been recently playing with Linux and I'm
> > considering to build a poly synth with the digital software
> > oscillators and analog filters.
> 
> For waveforms such as sawtooth, square and triangle, software
> oscillators are hard. If the frequency is not a whole
> submultiple of the sample rate, aliasing occurs. Unless you
> generate the wave form additively, and that can be quite costly
> in terms of CPU for low fundamental frequencies (at 50 Hz, there
> are 400 harmonics).
> 
>   http://www-ccrma.stanford.edu/~stilti/papers/blit.pdf
> 
> -- 
> André Majorel <URL:http://www.teaser.fr/~amajorel/>
> std::disclaimer ("Not speaking for my employer");
>