Logic Pro 9: No sound with EVB3 when using channels 4 to 16
The EVB3 will not be make any sound if you send MIDI notes to it on channels 4 to 16.
The EVB3 accepts MIDI input only on MIDI channels 1-3. MIDI data with other channels (4-16) will be ignored. If the track's MIDI channel is set to a value beyond 3, the EVB will not respond.
MIDI data on channel 1 or 2 plays the upper or lower EVB3 manual respectively, MIDI channel 3 plays the pedal. Set the MIDI channel of the EVB3 track to a value between 1 and 3 to play one of the manuals or the pedal.
If you set the MIDI channel parameter to the default of "All," the MIDI channel of your MIDI keyboard or MIDI notes in regions on the track will be passed unfiltered to the EVB3. Choose this setting for a split keyboard or a dedicated organ keyboard setup. You may then set a dedicated MIDI mode in the EVB3 graphical interface.
For further information on this kind of MIDI setup, please refer to the EVB3 section of the Logic Studio Instruments reference manual.