hey guys.
i've confirmed that parameters in the Amp and Delay blocks don't work with any Modifier Sources. so this means Control Switches, which were mentioned, but also anything else like External Controllers, LFO, etc. this will no doubt be fixed in the next version.
i've also confirmed that Expression Pedal data through an external MIDI controller and passed to the MIDI In port are not recognized by the FM3 in this beta. for example, setting your MIDI Controller to send CC#16 from a connected Expression Pedal, setting External Controller 1 to CC#16, then assigning Volume in a Volume block to External Controller 1 - it doesn't get the Pedal data.
afaik, these are the only outstanding bugs. definitely let us know if you experience anything else. thanks!