Patches and discussion for Ensoniq VFX family

Hello,

I recently purchased a VFX-SD1 .. this is my first synth of any 
kind.  There are certain sounds ( I would say about 85%) that exhibit 
strange behavior.. they seem to occasionally switch an octave down.. 
or at least half an octave.. for example.. if you just hit the same 
key in succession about 10 times.. about 2 or 3 out of the 10 the 
note will change pitch.  Is this normal?  I certainly hope not.

Some of the sounds do not display this behavior .. but very few.

I have reset the system.. (the hard reset where you hold down presets 
and hit the top left soft button).. and have reloaded the System.. 
with the same results.

I bought this unit at a pawn shop.. it appears to be in great 
condition.. but I just don't know!

Any help to a new user would be much appreciated.

Tom