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Description
The MERGE-4 has four MIDI Inputs and two MIDI Out ports to enable you to connect
several MIDI devices to one or two MIDI inputs.
The MERGE-4 has opto-coupled MIDI Inputs and separate drive circuits for each
MIDI Out socket for optimum performance. The MERGE-4 also contains active
circuitry that can restore the quality of signals received at the MIDI Input that may
have become degraded by losses in the MIDI cable.
The MERGE-4 is powered by a mains adaptor (supplied), so it doesn’t need periodic
battery changes to keep it working, enabling you to “fit and forget”.
Connecting
Ensure that the power adaptor is plugged in, and the ACTIVE LED on the MERGE-4
is on. Connect the MIDI output of your keyboard(s) and/or computer to the MIDI
Inputs of the MERGE-4 and connect one of the MIDI Out ports of the MERGE-4 to
the MIDI input of the device you want to control.
Do not connect any of the MIDI Out ports of the MERGE-4 back to the MIDI Input of
the device which is supplying data to the MIDI In port of the MERGE-4, as this may
cause a MIDI loop to occur. This may cause note hangs or other undesirable effects.
Merging Rules
You may find it useful to have an understanding of the following rules which the
Merge-4 uses when handling certain types of MIDI data. The Merge-4 defines one of
the four inputs as the
master
input for each of the following data types. One input
may be the
master
for one or more data types whilst a different input may be the
master
for another data type.
MIDI Clock
When power is first applied, no input is defined as a
master
and all clock messages
from all inputs will be passed until one input is defined as a
master
.
The most recent input to receive a START command (or Song Position Pointer=0
followed by CONTINUE) will become the clock
master
.
That input continues to be the clock
master
until another input satisfies the above
condition.
Active Sensing
The first input to receive an Active Sensing message will become the Active Sensing
master
. Active sensing messages from that input will be passed to the output, any
active sensing messages received at other inputs will be ignored. An input will stay
as Active Sensing
master
until no more Active Sensing messages are received at
