OK, cool! Now, 2 other things:
1. Don't sawtooth waves sound more like strings than pulse? Any way to get
around that?
2. You have 8 voice polyphony generated by the processor, using an external
filter, so how do you do the enveloping/VCA for each note separately? Do you
have separate output jacks for each polyphonic 'voice'?
Dave
> -----Original Message-----
> From: The Old Crow [mailto:oldcrow@...]
> Sent: Monday, November 01, 1999 4:21 PM
> To: motm@onelist.com
> Subject: RE: [motm] In a moment of clarity...
>
>
> From: The Old Crow <oldcrow@...>
>
>
> On Mon, 1 Nov 1999, Dave Bradley wrote:
>
> > Tell me more! Top octave / divide down generated stuff? How do
> you solve the
> > problem of detuned oscillators, where the beating frequencies
> don't remain
> > constant across the audio range?
>
> Octave divider(s), yes. ∗But∗ ...programmed in uC code. I can make
> coarse or fine changes in pitch by altering the period registers. Based on
> a MIDI or CV value, the "proper" detuning will be applied. A knob/CV can
> adjust the detuning away from a basic, and another knob/CV can specify the
> duty cycle. (typically 10% to 70%)
>
> Someone is bound to ask, so I'll state it here. It is possible to
> generate 8-voice polyphonic pulse waveforms on a fast uC. In fact I
> programmed a 12-note "+octave 3" (A=440) divider on a uC that was ten
> times slower than the part I have in mind for this.
>
> The tricker uC to program is the voltage-controlled pulse delay line to
> achieve a chorusing effect. If the tone generating uC is savvy enough,
> this one is not needed.
>
> There won't be any filters in the module I'm imagining. Thats what the
> 4xx's are for.
>
> --Crow
>
> /∗∗/
>
> >