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- DOEPFER
- CTM64 Contact to Midi Interface
- User's manual
Mode (jumper 5). DOEPFER CTM64 Contact to Midi Interface
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DOEPFER CTM64 Contact to Midi Interface
The DOEPFER CTM64 Contact to MIDI Interface is a versatile tool that allows you to connect up to 64 free contacts to generate MIDI note on/off or program change messages. This makes it ideal for retrofitting keyboards, switch panels, button arrangements, or any other contacts so that they are able to transmit MIDI data.
In addition to the 64 contacts, the CTM64 also has four potentiometer plugs that can be used to connect up to four potentiometers to generate common MIDI controllers, pitch bend, and aftertouch. There is also a 1/4" jack socket for connecting a sustain pedal.
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Mode (jumper 5)
Jumper 5 installed: note mode (factory setting)
Jumper 5 removed: program change mode
Note/program offset (jumper 8)
Jumper 8 installed: offset = 0 (factory setting)
Jumper 8 removed: offset=36 (in note mode), resp. 64 (in program mode)
Octave offset (jumper 6/7, working only in note mode )
Jumper 6 installed: offset = - 12 semitones (minus one octave) (factory setting)
Jumper 6 removed: offset = 0 (no transposition)
Jumper 7 installed: offset = + 12 semitones (plus one octave) (factory setting)
Jumper 7 removed: offset = 0 (no transposition)
If both jumpers are installed there is no transposition (+12-12 = 0).
Control LED (4)
The LED is used to display any MIDI out activity. After power on the LED is permanently on. As soon as a MIDI out event occurs the LED turns off for a short time thus indicating MIDI activity.
Factory setting of the jumpers
In the factory all jumpers of JP5 are installed. This means: MIDI channel 1, note mode, offset = 0, no transpose ( +12 - 12 = 0). The potentiometer connectors ST1...ST4 are equipped with jumpers too so that the inputs are connected to GND (i.e. no function).
CTM64 Version 4 - User's Guide Page 11
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Table of contents
- 2 Electrical safety / EMC compatibility
- 2 Warranty
- 3 Contents
- 4 Introduction
- 6 Connections
- 7 Power supply (1)
- 7 Midi Out (3)
- 7 Midi In (2)
- 7 Control LED (4)
- 7 Sustain (5)
- 8 Potentiometer connectors (6,7,8,9)
- 9 Contact 1-64 (10) and Common (11)
- 9 Jumpers 1-8 (12)
- 10 Operation
- 10 Detailed function of the 8 jumpers of JP
- 10 Midi channel (jumper 1,2,3,4)
- 11 Mode (jumper 5)
- 11 Note/program offset (jumper 8)
- 11 Octave offset (jumper 6/7, working only in note mode )
- 11 Control LED (4)
- 11 Factory setting of the jumpers
- 12 Check list
- 13 Appendix: Connection sketch
- 15 Additional jumpers for pcb version
- 15 64 note offset
- 16 Normal / Toggle operation
- 16 Control Change mode
- 17 CTM64 Button Board and Front Panel
- 19 CTM64 Relay Board