[sdiy] avrsyn code

[dougall]

Velocity should probably control the sustain level of the evenlope but in 
AVR-synth I'd say just the final amplitude. You could use one of the spare 
switches to optionally route it to the filter cutoff as well.

It would be nice to improve the filter a bit. It might be feasible to 
implement a 12dB SVF and add a switch to choose HP or LP. There is example 
code on www.musicdsp.com <http://www.musicdsp.com> for 12dB SVF and there 
are some good papers on avrfreak.net <http://avrfreak.net> on doing fixed 
point dsp on avr's.

I don't think there are any spare knobs for the resonance control but 
perhaps you could use a spare switch to select what function a certain knob 
is controlling. When the avr reads the knob values, it could check a switch 
value then load the knob value into the correct location based on the switch 
setting.

I'm waiting for my avr-synth pcb to arrive but once it's soldered I'm keen 
to get into some hacking.

--dougalli


On 7/11/05, Daniel Kruszyna <dan at krue.net> wrote:
> 
> Pete Niedermayr <pniedermayr at yahoo.com> wrote:
> > Is it possible to add midi velocity and mod wheel function?
> 
> Yes, mod wheel already controls lfo depth and I've added velocity
> to my todo list. In a "standard" (ha!) patch, does velocity control
> just the {d,v}ca, or does it affect other parameters as well?
> 
> -- Daniel
> 
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20050711/07ce489d/attachment.htm>