How do I know how many voices my virus is using?
 

I've come up with a great pad on my virus rack, but the problem is that it's only possible to play it with four different notes at the time. I've checked the edit menu and there's no restriction to how many voices the patch can use. Is it really possible that one pad will use all the 16 voices?

Ok, the unison was set to four, I've got it...

Is the unison settings the only thing that limits how many voices that's in use, or does the effects or something else also eat voices?

One note takes one voice, in twin unison one note uses two voices, in triple unison one note takes three voices, etc.

Also remember that if you have a long decay in a patch, that patch will eat the polyphony very efficiently since when you hit new notes the old ones are still playing.