In September 1996 Doepfer released the MMR4/4, a dedicated MIDI Merger/ Router module.
This versatile module, available in 2 sizes (standard case 200 x 100 x 42 mm or the 19" version with 1 HU), was equipped with 4 MIDI inputs and 4 MIDI outputs on the backside.
It did not have an on/off switch, and had to be powered by an external power supply.
Inputs and outputs could be easily assigned in any combination.
If you'd assign multiple inputs to a single output, the signals got merged.
The routing was set with 8 buttons and 8 LEDs at the front panel that were assigned to the 4 MIDI inputs and outputs.The MMR4/4 had 4 non volatile memories (Presets) to store 4 different matrix configurations.
The LEDs displayed the input/output configuration and could be changed very easy with the corresponding buttons.
During normal operation (monitor mode) the LEDs displayed the MIDI activities on the inputs and outputs.
A panic button was available transmitting "all notes off" on all channels and outputs if activated.
Around 600 of these units were made until they stopped selling the last ones in March 2001
There are no plans of a re-release of this module.
Find out more in the online manual HERE
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