If you have Opcode Studio-5 interface, or similar, which allows to access more that 16 MIDI channels with MidiTimePiece you can use def-setup to define your studio configuration. Each synthesizer accesses 16 channels and is connected to a different port.
(def-setup
k2000 0 ; MIDI port 0 Ch. 1-16 (modem port)
k2000i 1 ; MIDI port 1 Ch. 1-16 (printer port)
k2000ii 2 ; MIDI port 2 Ch. 1-16
super-soundcanvas (3 4) ; MIDI port 3 and 4 Ch. 1-32
)
def-setup creates atom names that contain the proper virtual channels. Above lets you now use channels like