Tip one
Use a notebook to write down patches you find.
Tip two
i) power up vortex while holding both 'A/B' and 'reg/preset'
ii) turn preset knob until OB appears, (or OA).
iii) press reg/pre button.
iv) turn reg/pre knob to produce a series of tones
v) parameter knob varies volume
This would seem to be a very high quality sine wave generator,
125Hz to 16kHz
Tip three
http://members.aol.com/soundfnr/vortex.htm
Andy Butler