Here's a couple more ideas for you:
- In Multi mode, put your pad sound on channel 1 (no arps or gated LFOs, just a pad);
- ideally, you'd use an external sequencer to record something on this channel, so the pad will keep playing while you proceed to the next steps;
- set the pad's output to Out2 L+R;
- connect Virus's Out2 to the input;
- on channel 2, put an input preset (Input mode=dynamic)
- play any rhythmic pattern on channel 2. Or record it in the sequencer, quantize, and free your hands to tweak the filters;
- listen to the trance come out

You can even send several parts to Out2 and gate them all together.
Alternatively, use an Atomizer preset. You lose the filters, but gain, er, the atomizer

Note that gating works differently - in dynamic input mode, you press any key to turn the sound ON, while in atomizer, you press a certain key (D# 3 or something) to turn the sound OFF, although this is reversed if you press and hold another key (D#2 iirc).
Have fun!