Musicom Lab EFX MKII User manual

USER MANUAL
(Ver3.0 )

Thanks for your purchase of the Musicom Lab EFX MkII Audio Controller. This Manual
will introduce you to the EFX MkII and its features. After reading this manual carefully
keep it for future reference.
CONTENTS
1. Introduction ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 3
2. Basic Connection ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 4
3. Mode Description ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 5
3.1 Preset Mode ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 5
3.2 Direct Access Mode ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 5
3.3 Edit Mode ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 6
3.3.1 Editing MIDI Program Change ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 7
3.3.2 Editing MIDI Control Change ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 7
3.3.3 Editing XPDL Port ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 8
3.3.4 Conversion of Audio Loop into Control Function ‧‧‧‧‧‧‧‧‧‧ 10
3.3.5 Input Buffer On/Off ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 11
3.3.6 Popping Noise Reduction Control ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 11
4. Power Requirement ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 12
5. Initial Default Setting ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 12
6. Block Diagram ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 13
7. System Setting ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 14
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EFX MkII Audio Controller User Manual 3
1. Introduction
The EFX Mk II Audio Controller is the ultimate floor based switching system.
It is a compact, easy to use, fully programmable 8 function(8 loops / 7 loops+1 control function /
6 loops+2 control function) MIDI foot controller.
The EFX Mk II Audio Controller has 100 memory locations, configured as 25 banks of 4 presets,
plus a global preset.
It can transmit 5 MIDI Program Changes on 5 MIDI channels and 8 MIDI Control Change on an
appointed MIDI channel.
Also one continuous controller port(XPDL) is included and can be programmed with designated
MIDI channels and control numbers.
The EFX Mk II Audio Controller has two low-noise, high quality buffers to prevent the loss of
guitar signal. The input buffer can be bypassed for Hi-Z input pedals such as Fuzzes etc.
The EFX Mk II Audio Controller is made by high quality parts including heavy-duty stomp switches
and gold-plated relays.
It is cased within a compact and rugged aluminium enclosure(11"W x 5.2"D x 1.7"FH x 2.2"RH).
Top Panel View
Rear Panel View

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2. Basic Connection
The loop send jacks(S-1 ~ S-8) and return jacks(R-1 ~ R-8) connect to the effects unit's inputs①and outputs.
The guitar connects to IN A jack, and amplifier input connects to OUT B jack.②When there is the Hi-Z input pedal in the loop 1 ~ loop 4, the input buffer must be bypassed.
Refer to page 11.
The tuner connects to OUT A jack. If this function is used, do not insert any plug to IN B③jack.
The control function plug connects to CTL7 or CTL8 jacks when control function is used for④remote amplifier channel switching. Refer to page 10.

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3. Mode Description
The EFX Mk II Audio Controller utilizes three modes of operation, Preset Mode, Direct Mode and
Edit Mode.
On power-up, the display will show its firmware version, upon which bank 1and the global preset
will be selected.
3.1 Preset Mode
The EFX Mk II Audio Controller has 101 presets, configured as 25 banks of 4 presets, plus a
global preset which is common to all banks.
The Preset Mode is automatically selected when the power is initially turns on.
Press/hold the BANK UP or BANK DOWN switches to scroll through the 25 available banks.①The display will be flashing.②The preset is selected via pressing the PS-1 through PS-4 switches.③The display will stop flashing and the LED above the switch turns on.④
For example, to select the second preset of the bank 3, press the BANK UP switch until the 3is
shownonthedisplay.AndthenpressthePS-2switch.
The global preset is a preset with all the capabilities of preset 1 through 4, but is the same for
all banks. Pressing the switch of a preset that is already on selects the global preset and will
cause the LED above the switch to turn off.
Press the MUTE switch to mute the output. When muted, the three decimal points on the display
will turn on and output signal will be mute.
Press the MUTE switch to cancel the mute function. Mute function is available in all mode.
3.2 Direct Access Mode (Programming the Loops)
Select the preset to be programmed in the Preset Mode.①Press the MODE switch to enter the Direct Access Mode. The display will show:②
And the 4 LEDs above PS-1 ~ PS-4 switches will indicate the respective Loop 1 ~ Loop 4 as
on or off.
Press the PS-1 through PS-4 switches to turn the respective Loop1 ~ Loop4 on or off. The③respective LEDs will go on or off.

EFX MkII Audio Controller User Manual 6
Press the MODE switch. The display will show:④
And the 4 LEDs above PS-1 ~ PS-4 switches will indicate the respective Loop5 ~ Loop8 as
on or off.
Press the PS-1 through PS-4 switches to turn the respective Loop5 ~ Loop8 on or off. The⑤respective LEDs will go on or off.
Press the BANK UP switch to store the edit and return to Preset Mode. The other side, press⑥theBANKDOWNswitchtoreturntopresetmodewithoutstoringtheedit.
Follow the same procedure ~ for any other presets you want to program the loops.⑦①⑥
3.3 Edit Mode
The Edit Mode contains the utility functions. To enter the Edit Mode, you must be in the Preset
Mode. Press/hold the MODE switch to enter the Edit Mode for 1 second. The display will show:
Press/hold the PS-1 switch(FS, function select) to scroll the utility functions. Below is a list
functions in the order that they are shown.
Function Select Order List
PC1 sets 1st MIDI Program Change
PC2 sets 2st MIDI Program Change
PC3 sets 3st MIDI Program Change
PC4 sets 4st MIDI Program Change
PC5 sets 5st MIDI Program Change
CC1 sets 1st MIDI Control Change for the Loop1 On/Off
CC2 sets 2st MIDI Control Change for the Loop2 On/Off
CC3 sets 3st MIDI Control Change for the Loop3 On/Off
CC4 sets 4st MIDI Control Change for the Loop4 On/Off
CC5 sets 5st MIDI Control Change for the Loop5 On/Off
CC6 sets 6st MIDI Control Change for the Loop6 On/Off
CC7 sets 7st MIDI Control Change for the Loop7 On/Off
CC8 sets 8st MIDI Control Change for the Loop8 On/Off
EPL sets MIDI Control Change for the continuous control port XPDL
LP7 /Ct7 selects the audio Loop 7 or Control Function 7
LP8 /Ct8 selects the audio Loop 8 or Control Function 8
bon /boF selects the input buffer on or off
Pr0 ~Pr9 selects 10-stage popping noise reduction control

EFX MkII Audio Controller User Manual 7
3.3.1 Editing MIDI Program Change
SelectthepresettobeeditedinthePresetMode①Press/hold the MODE switch to enter the Edit Mode for 1 second if you are in the Preset②Mode. The PC1 will be automatically selected and the display will show:
Press the PS-2 switch(CH, channel) to set a③PC1 channel number. The display will show a
current PC1 channel.
Press/hold the BANK UP or BANK DOWN switches to select a channel from 1 through 16.④Press the PS-2 switch to store a new⑤PC1 channel in memory. The LED above the PS-2
switch will flash 2 times.
*ThePCs channel is global (the same for all banks/presets). you need not edit this for any
other banks/presets if you have already done so. In this case, omit the procedure ~ .③⑤
Press the PS-3 switch(PC, program change) to set a⑥PC1 number. The display will show a
current PC1 number.
Press/hold the BANK UP or BANK DOWN switches to select a⑦PC1 number from 1 through
128 or OFF.
Press the PS-3 switch to store a new⑧PC1 number in memory. The LED above the PS-3
switch will flash 2 times.
Press the PS-1 switch(FS, function select) to set other⑨PCs and follow the same procedure
~.③⑧
Note
*TheOFF means no Program Change is transmitted.
* The last decimal point on the display means that the display shows a PCs or CCs number.
* The Initial default channel setting are PC1 :01,PC2 :02,PC3 :03,PC4 :04andPC5 : 05.
* The Initial default number settings of the PC1 and PC2 are OFF.
3.3.2 Editing MIDI Control Change
The MIDI Control Changes are transmitted via MIDI OUT jack when the assigned loops turn on or
off. The CC1 is assigned the Loop1, ..... , and the CC8 is assigned the Loop8. The Control
Change Value is 0 or 127 when the assigned loop turns off or on.

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*TheCCs channel and number are global (the same for all banks/presets). you need not edit
these for any other banks/presets if you have already done so.
Press/hold the PS-1 switch(FS, function select) to edit the①CC1 until the CC1 isshownonthe
display if you are already in the Edit Mode.
Press the PS-2 switch(CH, channel) to set a②CC1 channel. The display will show a current
CC1 channel.
Press/hold the BANK UP or BANK DOWN switches to select a channel from 1 through 16.③Press the PS-2 switch to store a new④CC1 channel in memory. The LED above the PS-2
switch will flash 2 times.
Press the PS-4 switch(CC, control change) to set⑤CC1 number. The display will show a
current CC1 number.
Press/hold the BANK UP or BANK DOWN switches to select a⑥CC1 number from 0 through
127 or OFF.
Press the PS-4 switch to store a new⑦CC1 number in memory. The LED above the PS-4
switch will flash 2 times.
Follow the same procedure ~ to set from⑧①⑦CC2 through CC8.
Note
*TheOFF means no Control Change is transmitted.
* The last decimal point on the display means that the display shows a PCs or CCs number.
* The Initial default channel settings of the CCs are channel 1.
* The Initial default number settings of the CCs are OFF.
3.3.3 Editng XPDL Port
The EFX Mk II contains a XPDL port for expression pedal input. This can be used to alter
parameters(via MIDI) in effects device that offer this capability.
The MIDI Control Change Value is transmitted corresponding to the position of expression pedal.
The Control Change value is from 0 through 127 when the position of expression pedal is from
minimum through maximum. Any passive volume or expression pedal can be used. Recommended
pedals are Boss FV500L/H, FV300L/H, FV200 and FV100.

EFX MkII Audio Controller User Manual 9
*TheEPL channel and number are global (the same for all banks/presets). you need not edit
these for any other banks/presets if you have already done so.
Press/hold the FS-1 switch(FS, function select) to edit the①EPL for the XPDL port until the EPL
is shown on the display if you are already in the Edit Mode.
Press the PS-2 switch(CH, channel) to set a②EPL channel number. The display will show a
current EPL channel.
Press/hold the BANK UP or BANK DOWN switches to select a channel from 1 through 16.③Press the PS-2 switch to store a new channel in memory. The LED above the PS-2 switch④will flash 2 times.
Press the PS-4 switch(CC, control change) to set a⑤EPL number. The display will show a
current EPL number.
Press/hold the BANK UP or BANK DOWN switches to select a⑥EPL number from 0 through
127 or OFF.
Press the PS-4 switch to store a new⑦EPL number in memory. The LED above the PS-4
switch will flash 2 times.
The cable required is a stereo (TRS) to two mono 1/4" phone plugs. Connect the tip(stereo plug)
to the pedal input, ring to the pedal output and sleeve to ground on all 3 plugs.
Note
*OFF means no Control Change is transmitted.
* The last decimal point on the display means that the display shows a PCs or CCs number.
* The Initial default channel setting of the EPL is channel 1.
* The Initial default number setting of the EPL is OFF.

EFX MkII Audio Controller User Manual 10
* The active pedal(requiring a battery) will NOT work and may damage the EFX Mk II Audio
Controller.
* Connect a expression pedal to the XPDL jack before the power applies to EFX MkII Audio
Controller.
3.3.4 Conversion of Audio Loop into Control Function
Audio loop function 7 and 8 can be converted into control function 7 and 8.
The CTL7 and CTL8 jacks can be used as latching N.O.(Normally Open) or N.C.(Normally
Closed) switches for remote amplifier channel switching.
* The conversions are global (the same for all banks/presets). you need not edit this for any
other banks/presets if you have already done so.
Press/hold the PS-1 switch(FS, function select) to convert audio loop 7 into control function 7①until the LP7 is shown on the display if you are already in the Edit Mode.
Press the BANK UP switch to convert②LP7 into Ct7. The display will show:
It will automatically be stored in memory.
LP7 means that the audio loop 7 is selected.
Ct7 means that the control function 7 is selected.
Follow the same procedure ~ to convert③①②LP8 into Ct8
Cable Wiring
Standard 1/4" stereo or mono plugs connect to the CTL7 and CTL8 jacks.

EFX MkII Audio Controller User Manual 11
Note
* When the Ct7 or Ct8 are selected, the corresponding loop always turns on.
* The initial default setting is the LP7 and LP8.
3.3.5 Input Buffer On/Off
When you connect Hi-Z stompboxes like a Fuzz to in the loop 1 ~ loop 4, the input buffer must
be bypassed.
* The input buffer On/Off is global (the same for all banks/presets). you need not edit this for
any other banks/presets if you have already done so.
Press/hold the PS-1 switch(FS, function select) to bypass the input buffer until the①bon is
shown on the display if you are already in the Edit Mode.
Press the BANK UP switch to bypass input buffer. The display will show:②
It will automatically be stored in memory.
bon means input buffer is active.
boF means input buffer is bypassed
Note
* The initial default setting is bon.
3.3.6 Popping Noise Reduction Control
Ths EFX MkII Audio Controller is based on relay switching. This method is utilized to route the
audio signal with absolutely no tone coloration or degradation. But the disadvantage of relays is
that they can produce a slight popping noise when they switch on/off. The 10-stage popping noise
reduction control is brilliant to reduce this popping noise by muting time control of audio signal
and switching order when the relays switch on/off.
* The popping noise reduction control is global (the same for all banks/presets). you need not
edit this for any other banks/presets if you have already done so.
Press/hold the PS-1 switch(FS, function select) to set the popping noise reduction control until①the Pr0 is shown on the display if you are already in the Edit Mode.

EFX MkII Audio Controller User Manual 12
Press/hold the BANK UP switch to set a popping noise reduction control from②Pr0 through Pr9.
It will automatically be stored in memory when you return to Preset Mode.
Pr0 means the popping noise reduction control is not used.
∶
∶
Pr9 means the maximum of the popping noise reduction control.
Note
* The initial default setting is Pr4.
4. Power Requirements
The EFX Mk-II Audio Controller requires regulated 12VDC or 9VAC at approximately 400mA. The
power jack is a standard 5.5mm/2.1mm barrel.
5. Initial Default Setting
The initial default setting for the EFX Mk II Audio Controller may be reset with the following
procedure. This procedure will erase all user data from the EEPROM memory.
Apply power while holding the MODE and PS-1 switches down. The display will show:
The L1~L8 LEDs will turn on, at which point the two switches can be released.
When the initial default setting is successful, the EFX Mk II Audio Controller will automatically
restart.

EFX MkII Audio Controller User Manual 13
6. Block Diagram

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7. System Example
* Basic system
* Amp channel switching via CTL7 and CTL8

EFX MkII Audio Controller User Manual 15
* System with output switchable to either of two amplifiers used
* System with output switchable to either or both of two amplifiers used

EFX MkII Audio Controller User Manual 16
*Chorus/delaypatchchangeviaMIDIPCs
* Stereo system with MIDI controllable FXs via MIDI PCs(Patch change) and CCs(On/Off)

EFX MkII Audio Controller User Manual 17
*Racksystem
* Rack system with Mixer