Touch Sensors; Channel Switches - JLCooper Electronics MCS-3800 User's Reference Manual

Touch Sensor
A single command is sent every time a fader is touched, and
the same command is sent when the fader is released.
A user assigned value is sent when the fader is touched, a
different value is sent when the fader is released.
A typical application is to use the touch sensor to arm a fader
for writing automation moves, within software that supports
automation and also support MIDI control of on-screen
buttons.

Channel Switches

The Mute, Solo, Aux, and Select are user assignable, and bank
switchable.
The labels, "Mute, Solo, and Aux" are purely for convenience,
since those are designators of commonly used mix related
functions.
You can program these switches to send MIDI Controller and
MIDI Note commands.
A typical application is to use these switches for controlling
software that supports mixer related functions and also support
MIDI control of on-screen buttons.
These switches can be assigned to behave in two different
ways, either momentary or latched.
Momentary means the switch is on only as long as you hold
down the button. Latched means that the switch is press once
for on, again for off.
The LEDs for each of these switches can be remotely
controlled. For example, a sequencer can turn them on or off.
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