JL Audio MCS-3800 - Manual (Page 42)

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Touch May Interfere with Mapping Faders to Host
Some software applications require that the user "map" the
MCS faders to the host computer's on-screen faders. Sometimes
this procedure is called "capturing" or "learning" the fader
commands.
Some software applications achieve this by instructing the user
to move a fader on their controller, while the software is
prepared to read the command type sent by the controller.
Remember, however, that simply touching a fader on the MCS
Controller may result in sending a command. If you accidently
program your host system to read the touch sensor command,
instead of the fader command, the result will likely be that
moving the MCS fader will not move the on screen fader.
Rather, you will have the strange symptom of touching the
fader causes the on screen fader to jump to its maximum
position.
There are two ways to correct this. First, prior to mapping the
MCS faders to your host system, you may go into Assign mode
and set each touch sensor to "Off". Then proceed with
mapping, following your software host systems instructions.
When finished, turn the touch sensors back on if you need
them.
Encoders
The Rotary Encoders rotate freely in either direction, they have
no physical "end-stops", the way most pots do.
There are 24 positions per revolution, which are felt as a soft
"detent" or bump.
The Encoders are automatically accelerated. The faster you
turn them, the bigger the jump in values.
Encoders cannot be grouped.
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About Query Mode
When a switch is set to Query, it will not send a command.
When pressed, it puts the whole unit into Query mode.
In Query mode, no commands are sent, but the LCD will
display all the assignment parameters for the last control
activated.
Notice
In the initialized state, from the factory, the M buttons have
"MMC" selected, which is one of the last menu items.
If you want to assign an M button to send a Note or Controller,
for example, you will be rotating the encoder significantly
counter-clockwise to select and earlier menu item.
Number
Selects the Controller, Note, or Program number.
For M Buttons, when set to MMC, number is the targeted
Machine ID number.
Channel
Selects MIDI Channel 1 through 16.
Minimum (or Release Velocity)
Minimum controller or note off velocity value.
If the switch is Latch Off (see below), this is the value sent
when the switch is released.
If the switch is Latch On (see below), this is the value sent
every other press, when the LED turns off.