MLC LS12/2 User manual

MIDI LOOP & SWITCH LS12/2
Instruction Manual 1
MARK L Custom Guitar Electronics 1
MIDI LOOP/ SWITCH LS12/2
Instruction Manual

MIDI LOOP & SWITCH LS12/2
Instruction Manual 2
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Contents :
Introduction
Warranty
1 –Front Panel
2 –Rear Panel
3 - MIDI
4 –Configuration and effects plug-in

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Introduction
Congratulations on buying your MIDI/LOOP & SWITCH LS12/2
Our effect loops guarantee:
-perfectly transparent sound
-ultra-clean sound thanks to using passive components
-signal to noise ration comparable to CD quality recording s(102dB)
-no dynamic loss
-full bandwidth
-silent, click-free switching, even in high gain level
-MIDI compatibility ( CC# Control Change and PC# Program Change )
-two relay contact closures (S1-S2) for devices utilizing switch to ground
functions
-high grade low noise ( INPUT 1 ) line buffer
-alternating or direct current operation
LS12/2 is equipped with 12 effect loops, 2 switches ground separated,
LS12/2 is controlled by MIDI CC (Control Change) and MIDI PC ( Program Change )
commands over 16 MIDI channels.
LS12/2 is compatible with any type of MIDI controller capable of sending CC or PC midi
commands, but to ensure proper operation and maximum effectiveness we recommend using
MLC MARK L controllers.
The effects loop can be hooked up with:
-12 mono effects (12 effects plugged in before the amplifier)
-12 mono effects (12 effects plugged in the amplifier’s FX LOOP )
By dividing the loop into two sections we can plug in:
- 12 mono effects (7 before the amplifier and 5 in the amplifier’s FX LOOP)
- 5 stereo effects (5 left channels to loop 1-5 and 5 right channels to loop 8-11) achieving 5
stereo loops for 5 effects
- 7/5 or 5 MUTE EFFECT (in pair with a line mixer)

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In case this option is not used, receptacles OUT1 an IN2 are bridged inside the device. The
same applies to receptacles LINK OUT and IN1.
The rear panel also features two MIDI IN receptacles used for processing the foot pedal
signal and a MIDI THRU OUT, a bypass, thanks to which we can hook-up an additional
midi device which we want to control with the same device as the LS12/2
MIDI IN has built-in power supply for all MARK Lcontrollers, you need not plug in every
controller separately.
To change the channel (1-16) use the rotary dial on the rear panel.

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Warranty
1. The Warranty is limited to production defects and/or faulty components.
2. The Warranty expires 24 months after the date of purchase.
3. The Warranty does not cover the following:
Defects caused by shipping and handling.
Defects caused by improper usage, product abuse, product neglect, usage not
according to the manual or safety precautions.
Mechanical damage and defects caused by the former.
Defects and malfunctions caused by fire, flood, lightning strike or any other natural
disaster, acts of war or social turbulence, corrosion, rust, staining, short circuits,
wrong Voltage, wear or any other ‘outside’ element.
Service, improvements or modifications performed by someone other than the
Manufacturer of the device.
4. In cases not regulated by the above Warranty Terms and Conditions, appropriate Civil
Code regulations apply.
______________________
______________________
MARK L Custom Guitar Electronics
MARK L CUSTOM GUITAR ELECTRONICS
Ul. Stokrotki 12
80-732
Gdansk
POLAND
Mobile tel . +(048)506150803
WEB : www.marklcustom.com
Email : [e-mail]

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1. Front Panel
The front panel consists of 15 LED diodes informing which loop (L1-L12) or which switch
(S1-S2) is on, a MIDI light which informs if the device is receiving MIDI signals and 16
buttons.
The buttons turn audio loops 1 through 12 on/off and relay switches 1 through 2 on/off .
The LED above each button is lit when the corresponding audio loop/switch is on.
STORE - hold this button for three seconds to save the current settings to memory. The LEDs
will flash to confirm.
To connect audio through a high grade line buffer, connect to the JACK 6,3MM AUDIO
INPUT receptacle.

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2.Rear Panel
The rear panel consists of 6,3 mm ‘jack’ receptacles used for connecting effects, audio
signals and control the amplifier and other devices
- LINK OUT -feed thru on front panel output
- INPUT 1 -Effects loop 1-7 IN
- OUTPUT 1 -Effects loop 1-7 OUT
- INPUT 2 -Effect loop 8-12 IN
- OUTPUT 2 -Effects loop 8-12 OUT
- TUNER OUT -transformer separated TUNER out socket
- 12 x Send -used for connecting the effect’s IN socket
- 12 x Return -used for connecting the effect’s OUT socket
- 2 x Switch -used for controlling the amplifier channels, tone etc.
- GND/LIFT switch used for separating ground from the housing killing the so-called
‘ground loops’
- MIDI IN used for Communications with a midi controller
- MIDI OUT THRU a MIDI bypass used for connecting and controlling (by a MIDI
SIGNAL) an additional device
- MIDI CHANNEL switch used for switching channel from 1 to 16
- POWER IN Power supply socket for AC 9V/800mA
AC Plug 2,5mmx5,5mm
EXT POWER IN for AC power converter 9VAC
AC Plug 2,5mmx5,5mm PHANTOM POWER for FX25

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3.Midi
MIDI CONNECTION and Phantom Power for FX25/FX25ACE
MIDI INPUT signal
Pin 1 - NC
Pin 2 - NC
Pin 3 - NC
Pin 4 - MIDI (+)
Pin 5 - MIDI (- )
Pin 6 - 9VAC phantom power out
Pin 7 - 9VAC phantom power out
MIDI OUTPUT
Pin 1 - NC
Pin 2 - NC
Pin 3 - NC
Pin 4 - MIDI (+)
Pin 5 - MIDI (- )

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The LS10/6 is operated by MIDI CC (Control Change) or MIDI PC ( Program Change )
commands over 16 channels. There are 128 MIDI CC commands used worldwide (CC0-
CC127). Each commands has a VALUE (0-127) in which “0” stands for OFF while “127”
stands for ON.
MIDI CHANNEL is a dial used for changing MIDI channels from 1-16
0 - CHANNEL –1
1 - CHANNEL –2
2 - CHANNEL –3
3 - CHANNEL –4
4 - CHANNEL –5
5 - CHANNEL –6
6 - CHANNEL –7
7 - CHANNEL –8
8 - CHANNEL –9
9 - CHANNEL –10
A - CHANNEL –11
B - CHANNEL –12
C - CHANNEL –13
D - CHANNEL –14
E - CHANNEL –15
F - CHANNEL –16
To save a setting to a MIDI program change:
-Select a MIDI program number with your MIDI footswitch or controller.
-Manually select the desired state of each Audio Loop using the MLC LS10/6’s front
panel buttons.
-Hold down the STORE button until the LEDs flash.
MIDI Control Change
Available, are a few factory commands used for activating the effects loop or switches in a
various manner.
The below chart portrays the available factory combinations:
Commands used for the LS10/6:

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ON/OFF normal mono mode ON Value -127 , OFF Value -0
L1 = Midi Control Change # CC-11
L2 = Midi Control Change # CC-12
L3 = Midi Control Change # CC-13
L4 = Midi Control Change # CC-14
L5 = Midi Control Change # CC-15
L6 = Midi Control Change # CC-16
L7 = Midi Control Change # CC-17
L8 = Midi Control Change # CC-18
L9 = Midi Control Change # CC-19
L10 = Midi Control Change # CC-20
L11 = Midi Control Change # CC-21
L11 = Midi Control Change # CC-22
ON/OFF normal mode ON Value -127 , OFF Value -0
S1 = Midi Control Change # CC-23
S2 = Midi Control Change # CC-24

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4. Configuration
and
effects plug-in.

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