Midi Between Panther And Classic Options

[MycoTypo]

Hi guys:

I have Onadime Composer for OS 9.x. It's a VJ app that responds to MIDI and audio input. Trouble is, I am using Panther now on a Powerbook G4.
Does anybody know how can I communicate between MIDI soft under Panther with MIDI apss running in Classic?
IAC buses seem to be independent in both systems.
What I would like to do is send MIDI and audio data from, say, MaxMSP and receive aqnd process the stuff with Onadime.

Any help?