Yup, I figured out a way to get unison. The best part? You don't need anything but the synth... no external effects, nothing.....
Here's a (highly compressed) sound demo that I've uploaded to SoundCloud:http://soundcloud.com/synthoid/four-voice-unison
So, how do I do it? Simple.
On any patch SIMPLE patch (no envelope stuff or the trick won't work), do the following:
1: Turn on the Arpeggiator, and flip the "Sync" switch on...... (also, make sure that the arp is set to ONLY 1 octave. Not 2, not 3, not 4... just 1.
2: Turn the rate ALL THE WAY UP. (You could probably put your host's rate up aswell)
3: Make sure that ENV-1 has zero attack, lots of decay and full sustain.
4: Use the programmer to detune the voice cards to your liking.... If you DON'T do this, you won't get anything resembling that classic Oberheim unison... just...... well, something digitally perfect. Detune that shit, mess with the filters to.
That should be it. I have yet to see if changing the Voice patterns has any effect on this little trick. Obviously there are shortcomings here. Like how you can't use the envelopes.... Seeing as the sound is just an arpeggiator repeating itself really quickly, if you were to add ENV-2 into the equation, you'd just get crackling as the enveloper re triggered at light speed. But hey! It's Unison non the less....
ARTURIA, this will hold me for a while, but PLEASE, get a proper Unison mode in there!