When controlling the CAE OD100 with the CFX4 and this cable, the following applies;

CTL3 on/off	Channel
CTL4 on/off	Boost 2

CTL3 - CTL4 must perform LATCH type switching, not momentary, so;

If you're using MIDI Program Change messages to control the CFX4, follow the "Edit Control Configuration" section in the CFX4 user manual and configure the CTL functions listed above for LATCH type switching.

If you're using MIDI Control Change messages to control the CFX4, ensure your MIDI footcontroller is setup to transmit the MIDI Control Change messages for LATCH type switching as listed in the CFX4 user manual.

The CAE OD100 does not utilize the CTL1/2 functions so they can be used with other amps/preamps.