Re: How is the IIgs beep generated?

[mdj <mdj.mdj@gmail.com>]

On Dec 3, 11:07 am, "Michael J. Mahon" <mjma...@aol.com> wrote:
> Michael J. Mahon wrote:
> > Mitchell Spector wrote:
>
> >>     Here's a question, one I've been curious about the past twenty years:
> >> Can you reproduce the IIgs "beep" on a stock Apple IIe?
>
> > It can be played using DAC522, but with 5-bit rather than 8-bit
> > precision, so it will be a little "rougher".  Still, it would be
> > a nice hack.  ;-)
>
> Can someone point me to the "bong" sound in the IIgs ROM?
>
> I'll extract it and try it out on SOUND.EDITOR.

Isn't the pitch and duration set by control panel parameters? It'd be
easy enough to hack the gs routine into a IIe ROM (if you don't
already use the self-test for other interesting things), but setting
the parameters is much harder.

Matt