Re: Looking for ALF AM ][ disks images

[Steve Nickolas <usotsuki@buric.co>]

On Thu, 11 Oct 2012, Phil Tubb wrote:

> To clear up the chips mentioned earlier in this thread, the Apple Music 
> Synthesizer (aka Music Card MC16) was the first music card for the Apple 
> II, and a pretty big seller.  Texas Instruments cloned that entire card 
> into a single IC, the SN76489, reducing the number of bits in the 
> frequency control and the exponential volume control, and adding a 
> white-noise source.  ALF's Apple Music II (aka Music Card MC1) used 
> three of the TI chips, and was also a large seller, and was cloned and 
> copied by several companies (often illegally).  This is why the MC16 
> sounds better than the MC1... because it has better tuning accuracy and 
> better resolution on the envelopes (crucial to doing additive 
> square-wave synthesis) and volume.

The Tandy 1000 used a clone of the SN76489, if I recall.

-uso.