Route the audio outputs of your synth into two inputs of the Digi001 (I would suggest inputs 3 & 4 so you can take advantage of the monitor mode). In Pro Tools, create a MIDI track and a Stereo Aux Track Set the Aux Track's input to coorespond with the input pair your synth's audio outputs are connected. Rec-enable the MIDI track, set its destination to a channel on your synth (select a desired patch) and raise the fader of the Aux Track. You can now rec MIDI data while monitoring the audio of synth within Pr Tools. Brent