...hit reply too soon.
I never saw much success on the 8bitters with any of that.
On 8/12/05, Doug Dingus <opengeek@xxxxxxxxx> wrote:
>
> I did this long ago on the 8bitters. It's true @ 60Hz you will hear it.
> You hear it up to fairly high frequencies. What happens is the ear
> translates these into extra notes or it's heard as a pitch shift happening
> rapidly if the frequency is low enough.
>
> Because our ears work in frequency / time domain, all of these things are
> well outside our tolerances and we hear them.
>
> One thing that does work fairly well is to alternate the pitches every
> cycle. --with some pattern, 112112112, 121212121, etc... Let each tone run
> for exactly one cycle, then start the other one. I'm not sure the 2600 has
> the muscle to actually get this done however.
>
> On 8/12/05, Manuel Rotschkar <cybergoth@xxxxxxxx> wrote:
> >
> > Hi there!
> >
> > >> The idea is to take two adjacent TIA notes that use the same
> > >> distortion, and rapidly toggle between them on alternate frames.
> > >> Call it "audio flicker"... I *think* the human ear will perceive
> > >> this as a frequency halfway between the two, but I'm not sure...
> > >
> > > Don't underestimate the human ear. AFAIK it's harder to fool than the
> > > human eye.
> >
> > Yup. At 60Hz you'll hear it vibrating.
> >
> > Techniques like that are normally rather used with the volume than with
> > the frequency, so for example you can fake 5-Bit quality samples with
> > the
> > TIAs 4-Bit volume register by dividing each 5-Bit sample in two 4-Bit
> > samples and feeding them to the TIA twice as fast as the 5-Bit
> > sample-speed.
> >
> > For example
> >
> > 5-Bit value = 23 ( /2 = 11.5)
> >
> > Will result in
> >
> > 4-Bit val 1 = 11
> > 4-Bit val 1 = 12
> >
> > (Hm... Isn't that called "oversampling"? :-))
> >
> > Greetings,
> > Manuel
> > Archives (includes files) at
> > http://www.biglist.com/lists/stella/archives/
> > Unsub & more at http://stella.biglist.com
> >
> >
>
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