Re: "Noisemaker": Need G.I. AY-3-8910 sound chip app note

[jensk@hpbbn.bbn.hp.com (Jens Kilian)]

> Does anyone have the application note that engineers at General
> Instruments (now Microchip), possibly on an unofficial basis, issued on
> the AY-3-8910 sound chip?

I don't have this application note, but AFAIK the GI sound chip is 100%
compatible to the Yamaha chip used in Atari's ST/TT series.  This means that
all of the tricks you can do on an Atari (like playing back sampled sounds)
should work on the AY-3-8910.

> It doesn't actually cover making a bell-ringing sound; does anyone out
> there know how to do it?   Is it just a matter of programming the right 
> envelope?  

Should be. You need a short attack time and a longer release time (sorry, but
I forgot most of the stuff I once knew about that chip).

> 3.5 Envelope Generator Control
> 3.5.1 Envelope Period Control
> 3.5.2 Envelope Shape/Cycle Control

This sound about right.

Hope this helps,

	Jens.
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