MIDI provides a message for turning this feature on and off, called "Local Control". When Local Control is on, keyboard data is sent to its iwn synth as well as generating MIDI output. This is the normal state of affairs. When Local Control is off, keyboard data is sent out to MIDI only.
Substitute Program Change Numbers
This command allows you to replace a program number with another one.
NOT YET IMPLEMENTED.
Active Sensing Filter
Some MIDI devices send out an "active sensing" message every so often when
they are not transmitting any other MIDI data. This can confuse or slow down
some other MIDI devices. Turning the active sensing filter on tells
The KeyMaster to block any incoming active sensing messages
from being sent out.