The one in front actually looks like it might be a step sequencer of some sort. Notice the twelve knobs which are similar to amount of steps that the SQ-10 had, plus it has keys for possibly inputting notes. 27 notes though?

Black one in back appears to be drum machine, possibly a throwback to the KPR-77 and TR-808. This one makes sense as a drum machine since there's 16-step button keys and they are all the same color.

Middle one is obviously a TB-303 knock off and one giant middle finger to Roland, haha.

I'm digging the possibilities here.