Dimension C users:

['59]

The stereo inputs are generally used with two fairly similar sounds. What would happen if I say ran ryhthm guitar through left in/out and lead through the right in/out?

['59]

Also what does this mean, from Boss:

The DC-2W’s SDD-320 mode fully captures the original Dimension D vibe in every way. Many engineers like to press multiple buttons on the Dimension D rack for new and different sounds. But in truth, only two actual sound variations are technically possible with this undocumented feature. With its modern switching, the DC-2W’s SDD-320 mode enables six sound variations when two buttons are pressed, including four “in-between” sounds and two all-new voices.

What were the two sound variations?

[El Dunco]

What exactly does it do? As far as I can tell it’s a BBD chorus with modulated delays blended in.

[stevie_bees]

The 2 sound variation were only available on the original Dimension D I believe. You actually get more sounds on the DC-2W. I have mine set up with a 2 to 1 'summing' box under my board, so I'm only using 1 input in on the DC-2W and the 2 stereo o/p's to my delay/reverb. It's been a while, but I think when I had it set using the 2 stereo I/p's that they stayed separate. In my case one I/p came from my SY-1 Synthesiser routing, and the other came from my 'normal' guitar drive routing. When going out to 2 amps, the synth sounds were on one side and the guitar sounds were on the other. I wanted both synth sounds and normal guitar sounds to go through to both amps.

These days I'm only using one amp, so both sounds go to that.

[Chistopher]

What exactly does it do? As far as I can tell it’s a BB chorus with modulated delays blended in.

It's a chorus that is described as "motionless", because the modulated signals are out of phase with eachother.