We are playing the PERfourMER MKII's cutoff frequencies and keep them in sync with the help of some rubber bands. OK, it's not a perfect synchronization, but, on the other hand, these deviations turned out to be quite musical.
We are still working on improvements.
Links
PERfourMER MKII product page: http://www.vermona.com/en/products/sy...
More from VERMONA: http://connect.vermona.com