Well after a bit of tooling around in GarageBand 11 (without a clue what I was doing) I have discovered I can assign an assortment of wah or expression pedals to my external Yamaha FC-7 expression pedal. The trick is how they are then set up in the virtual GarageBand stompbox chain which then can be switched on or off through the Apogee Gio.
Takes some messing around but it can be done. As well I have an external BOSS volume, BOSS PW-10 V-Wah, Radial BigShot and a Wampler Pinnacle pedal paired up from the Apogee GiO guitar input for the sake of having non moddled effects to call upon. My guitar's cable runs from the guitar jack into the Wampler then into the Radial BigShot, Boss wah and volume pedals and onwards into the GiO.
This setup is then complimented with the separate external Yamaha FC-7 expression pedal that is linked to a selected GarageBand wah and the whammy pedal. All while tightly put together in the virtual pedal board.
Took some effort but it all seems to work, until the next GarageBand update, :- / .
Just wish there was more concise instructions on the use of pedals with an external expression pedal vs having to work it out on blind ambition and faith.
Alls well that plays well I guess.
Now young guitar players, witness the full power of this armed and operational pedal board... insert maniacal laugh here.
-CF-