If no effects are used, the Cancun has 64 voices.

If effects are used, the number of voices is reduced according to the chart
below.  This chart shows the polyphony required for each effect.  The 
available polyphony is 64 minus the polyphony required by the effects on: 

POLYPHONY COMPUTATION CHART: 

FEATURE                     REQUIRED POLYPHONY       POWER-UP DEFAULT
--------------------------- ------------------------ ------------------
Reverb                      13                       On (13)
Chorus                       3                       On (13)
Spatializer                  2                       On (2), Volume=0
Equalizer 4 bands (2 bands)  8 (4)                   On 4 bands (8)

The power-up available polyphony is 38 voices (64-13-3-2-8).  
With all features OFF, the maximum available polyphony is 64 voices. 

Note: Voices here implies POLYPHONY, which is how many keys can be 
  depressed and heard at a given moment without layering voices.  
  This is not to be confused with sounds or patches.


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