I see that i wrote on the old elektron users forum that i let the arp trigger the amp. It should be pretty straight forward. Just start with an arp setting that gives you a very fast trigging of the sound. Then set LFO to one shot i think, and let it control volume. Adjust to taste.
Another thing i did was setting up a two step arp. On step 2 in the arp menu, i transposed it like -1. At a faster than 16th notes, i could then press two keys and it would play the same note, but at different speeds. So it worked like ratcheting. Must use sid mode ofcourse. Oh, man i miss sid mode arps! Why havent anyone done a similar thing after the monomachine.
I did find a song i posted at Elektron users wich i used the bbox arp trick.