Structure - G-Lab M4L User Manual

Dear Customer,
Congratulations for choosing our G LAB product!
MIDI 4 x LOOP (M4L) is a loops' switcher controlled by MIDI interface
(by Program Change or Control Change commands) or manually, by using
the buttons. Using the MIDI commands it is also possible to mute the signal
(e.g. for silent tuning). M4L can be controlled by every MIDI controller and it
is particularly recommended as an extension of the G LAB guitar system
controllers GSC.
Basic characteristics:
- four bypassed (by electro mechanic relay) loops to connect the pedal
effects or serially connected sets of effects,
- muting circuit based on opto elements,
- MIDI THRU connector to connect other MIDI devices,
- power supply and active loop indicators,
- four buttons for loops' manual on/off switching,
- power supply 9V DC (direct current).

Structure

1 - Signal output connector
2 - LOOP 4 signal input (RETURN)
3 - Power supply connector
4 - LOOP 4 signal output (SEND)
5 - LOOP 3 signal input (RETURN)
6 - MIDI channel settings switcher
7 - LOOP 3 signal output (SEND)
8 - LOOP 2 signal input (RETURN)
9 - LOOP 2 signal output (SEND)
10 - DS1 and DS2 micro switch
11 - LOOP 1 signal input (RETURN)
12 - LOOP 1 signal output (SEND)
2
13 - Signal input connector
14 - MIDI input
15 - MIDI copy (THRU)
16 - Loop 4 status indicator
17 - Loop 4 on/off button
18 - Loop 3 status indicator
19 - Loop 3 on/off button
20 - Loop 2 on/off button
21 - Loop 2 status indicator
22 - Loop 1 on/off button
23 - Loop 1 status indicator
24 - Power supply indicator