[sdiy] avrsyn update

[Pete Niedermayr]

What is a .ogg file and what do I need play it ?

--- Daniel Kruszyna <dan at krue.net> wrote:

> Jaroslaw Ziembicki <aon.912230836 at aon.at> wrote:
> > I saw the code and I wonder how the filter sounds?
> > A simple 8 bit arithmetics has been used. Is it
> really sufficient?
> > Does the filter work stable?
> 
> It's not exactly hifi, but it sounds better than I
> expected. I was
> concerned about the 8bit arithmetic as well but
> noticed that there
> is already a spot in the code where an intermediate
> value is
> shifted to 7bit precision. So I decided to give it a
> try.
> 
> It becomes unstable for small values of the control
> parameters. I am
> trying to work around this problem with a
> replacement lookup table.
> However, it didn't become unstable for high input
> frequencies, which
> I've heard is usually a problem for simple digital
> SVFs.
> 
> I've made a couple quick samples to answer your
> first question.
> 
> http://krue.net/avrsyn/avrsyn-seq.ogg
> 
> Is a simple sequence with me tweaking the knobs in
> realtime. You can
> hear a few spots where I turned the knobs too low.
> 
> http://krue.net/avrsyn/avrsyn-svf.ogg
> 
> Here, I switched the DCA to GATE mode, and used the
> envelope to
> sweep the filter. I hope to eventually have separate
> envelopes.
> 
> -- Daniel
> 
>