The CRX8-M retrofit enables your Roland CR-68 or CR-78 drum machine to be integrated into MIDI system. With its help, circuits of the instrument can be controlled wia MIDI. All original functions of Roland CR-68 / CR-78 instrument stay unchanged.

The interface can work in one of these three working modes:
Normal
- The interface is switched off, the CR-68 / CR-78 instrument works the same way as before the interface installation
Clock
- Internal instrument's tempo generator is switched off.
- Tempo of instrument's sequencer is synchronized with MIDI clock.
- Run of the sequencer can be controlled with Start/Continue/Stop MIDI commands and with Start/Stop button on instrument's panel simultaneously.
- Tempo of the sequencer can be doubled
Note
- Internal instrument's sequencer is switched off.
- Instrument's sound generators are launched by MIDI notes (Note-On).
- Dynamics of sound generators is driven by Velocity of MIDI Note-On commands.
- User programmable map of drum instruments including dynamics of particular instruments.
- Possibility of volume control with MIDI Control Changes (CC7 a CC11).

Number of MIDI channel for communication with host system is programmable by user.

Parameters for control of the interface in working modes Clock and Note can be set with help of MIDI Control Changes:
- CC16: Velocity Priority
- CC17: Velocity Curve
- CC18: Noise Gate Delay
- CC19: Guiro Short Duration (only for CR-78)
- CC20: Guiro Long Duration (only for CR-78)
- CC21: Volume Control Mode
- CC22: MIDI Tempo Multiplier
Chosen values then can be stored to memory with help of CC119.

The interface also recognizes standard MIDI Control Changes Volume (CC7) and Expression (CC11).