Arp Quartet cheap?

[WeAreAs1 at aol.com]

In a message dated 11/4/99 8:51:19 PM, you wrote:

<<Wow, what nostalgia...  I built a 4 voice synth with a 50240 years
ago.  I still have 2 of the chips.  If I remember correctly I think the
ratios provide at least 1 cent accuracy.  It was a very simple synth,
but it was 4 voice polyphonic.>>

Why only four voices, when those top-octave chips would allow full polyphony? 
 How did you limit the polyphony?  How did you allocate the voices?

Michael B.