Doepfer MTC64 Midi to Gate Interface (main board) - Manual (Page 10)

Page 10 MTC64 V2 User’s Guide
Note/program basic offset (Jumper 8 of JP6)
Jumper 8 installed: offset = 0 (factory setting)
Jumper 8 removed: offset = 36 (in note/control change mode)
offset = 64 (in program mode)
Remark: If you want to change the note/control change offset (= note number or control
change number assigned to output #1) to the standard note number 36 (= lowest "C" of a
standard 5 octave MIDI keyboard) jumper 8 has to be removed ! This applies probably in
most cases when note mode is chosen.
Octave Transpose (Jumper 6/7 of JP6, effective only in note/control change mode )
Jumper 6 installed: offset = - 12 (minus one octave in note mode) (factory setting)
Jumper 6 removed: offset = 0 (no transposition)
Jumper 7 installed: offset = + 12 (plus one octave in note mode) (factory setting)
Jumper 7 removed: offset = 0 (no transposition)
If both jumpers are installed there is no transposition (+12-12 = 0).
Output Polarity (Jumper 5 of JP7)
Jumper 5 installed: active output(s) = 0V
(= inverse polarity) inactive outputs = +5V
(factory setting)
Jumper 5 removed: active output(s) = +5V
(= normal polarity) inactive outputs = 0V
Remark: If normal polarity is required (i.e. +5V for active outputs) jumper 5 of JP7 has to be
removed as the factory setting is inverse polarity. In the first edition of this manual the setting
of jumper 5/JP7 was mixed up.
LED Display
The LED is used to display any MIDI In/Out activity. After power on the LED is permanently
on. As soon as a MIDI in event occurs the LED turns off for a short time thus indicating MIDI
activity.
Remark: If the device controlling the MTC64 transmits "MIDI Active Sensing" messages the
LED will flicker permanently. This is normal as "Active Sensing" is a dummy messages that
is sent permanently and checks only if the MIDI hardware connection is OK.