[Coco] Re: Banking ROMS (was-6309 microprocessor project:11-01-2003)

[Roger Taylor]

At 04:27 PM 11/3/2003 -0500, you wrote:
>In a message dated 11/2/03 8:22:19 AM Eastern Standard Time,
>Torsten at Dittel.info writes:
>
> > > Now, dern it... how did you create the "We Gotcha!" vocals in your
>Mega-Bug
> >  > game?!  :)
> >
> >  I guess it's kind of 1-Bit PCM sampled using the CoCo's "Zero Crossing
> >  Detector" (cassette port). Recording is done saving the (loop-) times
> >  between "bit changes" of the cassette port. Playback is done outputting
> >  the "bit changes" to the CoCo's "One Bit Sound" and waiting the recorded
> >  (loop-) times again (kind of sequencer).
>
>My own experienced ear tells me that the "We Got Choo" and the opening
>Mexican theme music are both done in 6-bit D/A sound.  While it's true 
>that you can
>only *record* 1-bit zero-crossing sound thru the cassette port, you can 
>output
>either 1-bit or 6-bit sound to the cassette and TV ports.  Steve would have
>recorded and/or synthesized the tune and speech at leisure on better hardware.

I recall seeing the single-bit code in his game pack.  Could be wrong; it's 
been way too many years.  Man, was I addicted to the CoCo back then.


>Zero-crossing one-bit sound has been played with on the Coco, and it is more
>or less intelligible if you already know what's being said ("Player One, your
>shot" from some old aircraft game comes to mind), but Mega-Bug sounds much
>better than that.

Yea, that asteriods type game that yelled out the scratchy "player one, 
your shot" tickled me.