I was fooling around in Reason with the Subtractor and I ask myself if my coming Virus C was also able to (realtime/live) change the octave of the osc while playing.
Example:
Osc 1 : 3 oct
Osc 2 : 4 oct
I looked into the manual of the C but I didnt find something (in the oscillator section page 5

unless I overlooked it...
this is the subtractor:
http://www.vintagesynth.com/misc/reason1.shtml