Hi,
My impression is that for the mod wheel to work in Logic on the articulation, it has to be assigned to controller channel 4, not channel 1 as in Garage Band. I do this from my midi keyboard. The following may say something like that in a more confused style (from New in Logic 2) -
Remapping of Pitch Bend and Modulation Wheel events
In order to create realistic-sounding performances in an easy and intuitive way, the Jam
Pack 4 (Symphony Orchestra) Instruments use the modulation wheel to switch
between articulations (legato, staccato, and so on) and the pitch bend wheel to change
expression (crescendo, diminuendo, and so on). Further information about this can be
found in the Jam Pack 4 documentation.
This is achieved by internally remapping pitch bend events to MIDI controller 4 and
modulation wheel events to MIDI controller 11. To ensure compatibility with the Jam
Pack 4 instruments, the EXS24 mkII now uses this remapping behavior for all
instruments that use controller 4 to switch between groups.
Please note that this new remapping model is also valid for user-built instruments. If
you use controller 4 to switch between groups, the EXS24 mkII will remap incoming
pitch bend and mod wheel events to controller 4 or controller 11, respectively. The
default pitch bend and modulation wheel functionality can not be used. If you don’t
want to use this remapping model, select a different controller number for group
switching.
Good Luck,
Ray