I have that exact setup and love it. Also very cool for Wallanders WIVI and Samplemodellings The Trumpet.
Just make sure you download that little sysexfile for the MIDIsolutions converter that changes the default output from volume to breathcontrol.
In its default state it will put out volume control changes and those only screw up the mixer settings in your DAW.
Some good soul here at NS pointed me to that solution and it works great.
Try some search for BC-3 and you should find it.
Interesting stuff......I use a Godin Synth Access guitar synth. Will I be able to use one of these breath control setups also, to control wind instruments in my GPO, J&BB and others?
Does anyone know if it just connects to a port on the MIDI Interface or would it have to connect to my guitar to midi converter directly or the keyboard controller? ( I'm not a keyboard player though )
I have the MOTU Midi Express 128 and connected to that I have the MIDI outs of the Axon guitar/midi converter and my Roland Edirol keyboard controller. Then it goes via USB to the Mac in which my DAW is Pro Tools.