Reply To: H9, switch doctor, and a Diezel Paul

[camn]

So, the switch Dr will control the two devices ~independently~.

It can send changes on any of 16 channels, all on the same cable. MIDI THRU is a feature that a device passes through all the messages to the next device in the chain.

So you chain your devices.
SwitchDr–>device1–>device2

Tell one device to listen on channel X, the other to listen on channel Y… They should ignore anything not on their channel!