MidiPort::outputChannelModel is ranged from 1 to 16 for displaying
user-friendly values. However internally MIDI channels are ranged from
0 to 15. Therefore added realOutputChannel() which returns zero-based
MIDI channel which should be used everywhere except for the GUI.
Fixes MIDI events being sent to VST plugins on channel 2 instead of
channel 1. Makes some more VST plugins actually usable.
Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>
(cherry picked from commit 4f249400ac)
91912e143a