ctlin Output incoming MIDI control change messages Ctlin can take up to two arguments for MIDI controller number and channel. The number of outlets is variable between 1 and 3 depending on the number of arguments. If a MIDI control change message is received, ctlin outputs ints from right (MIDI channel), middle (controller number), to left (controller value). Note: Controller 1 is normally the modulation wheel on most synthesizers.

from the library : Max Format : External Environment : max commercial Max 4.x http://www.cycling74.com