Glab Midi 2 x Loop Manual de usuario
Instrukcja obsługi
User Manual
Bedienungsanleitung
Midi 2 x Loop
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Version 2.3
Table of contents
Structure ___________________________________________________ 4
Scheme and signal path description ____________________________ 5
Manual loops switching_______________________________________ 5
MIDI channel setting _________________________________________ 5
Controlling via MIDI commands ________________________________ 5
DS2 ground lift switch ________________________________________ 8
Power supply _______________________________________________ 8
Possible using of the M2L_____________________________________ 8
Parameters ________________________________________________ 13
MIDI implementation chart ___________________________________ 14
FCC Compliance____________________________________________ 15
Declaration of Conformity____________________________________ 15
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Dear Customer,
Congratulations for choosing our G LAB product!
MIDI 2 x LOOP (M2L) is a loops’ switcher controlled by MIDI interface or
manually, by using the buttons. M2L should be controlled by programmable
MIDI controller (which enables to program and send chosen MIDI PROG
CHANGE or CTRL CHANGE commands for any controller’s preset). It is
particularly recommended to use the M2L as an extension of the G LAB GSC
guitar system controllers. Due to its passive signal path it is also possible to
use the M2L as an A/B/Y switcher.
Basic characteristics:
- two 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,
- possibility to control two M2L units by one Program Change command,
- two buttons for loops’ manual on/off switching,
- power supply 9V DC (direct current).
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Structure
1 - MIDI channel settings switcher 7 - LOOP 1 signal input (RETURN)
2 - DS1 micro switch 8 - LOOP 1 signal output (SEND)
3 - DS2 micro switch 9 - Signal input connector
4 - Signal output connector 10 - Power supply connector
5 - LOOP 2 signal input (RETURN) 11 - MIDI input
6 - LOOP 2 signal output (SEND) 12 - MIDI copy (THRU)
1 - Power supply indicator
2 - Loop 1 status indicator
3 - Loop 1 on/off button
4 - Loop 2 on/off button
5 - Loop 2 status indicator
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Scheme and signal path description
M2L has true passive signal path (without signal boosting and buffering
elements). Owing to this the M2L doesn’t influence the guitar tone (doesn’t
change the tone and doesn’t cut the signal). It is recommended to use the
M2L to "exclude" from the effects’ signal path the effects without true bypass
function. Controlling by MIDI provide galvanic separation from controlling
device. It is recommended to use 9V DC from separated source. Every time
after switching on the power supply both effect loops are switched off and the
signal path is “opened”.
Manual loops switching
To manual loops switching there are used two buttons signed LOOP1
and LOOP2. To switch on/off the loop press corresponding button.
MIDI channel setting
To set the MIDI channel use the rotatable knob signed as MIDI
CHANNEL. To switch the channel use the small screwdriver to turn smoothly
central part of the switcher to the right or to the left. The arrow-head indicates
set channel (letter A, B, C, D, E, F correspond successively with the channel
numbers 10, 11, 12, 13, 14, 15, and number 0 indicates channel 16).
Controlling via MIDI commands
M2L can by controlled by Program Change commands. DS1 micro switch
serves to choose the digit in Program Change commands that should be
considered by the M2L.
DS1=ON – received is the decimal digit of program number (units’ digit
is ignored)
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DS1=OFF – received is the units’ digit of program number (decimal digit
is ignored)
The table below shows the Program Change command functionality.
Using the DS1 micro switch enables controlling two M2L units by one
Program Change command (see example below).
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Scheme of connection in series of two M2Ls
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M2L looper can be also controlled by single Control Change command or by
separate controllers of the particular functions.
The tables below show functionality of Control Change commands depending
from the DS1 switch setting.
DS2 ground lift switch
DS2 micro switch serves to connect controlling circuit ground to main
signal ground. If the 9V power supply circuit is fully separated from any other
groundings it is recommended to switch DS2 to ON position.
Power supply
M2L should be supplied from 9V (DC) external adaptor (efficiency 60 mA
or more). Before plugging the power supply check the pin polarisation.
M2L is protected against opposite polarity.
ATTANTION!: Damage of the M2L caused by improper power supply causes
the loss of the warranty.
Possible using of the M2L
Below are shown the possible schemes of M2L connection with the guitar
system.
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