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Many effect pedals on the market use circuitry that is active even when the effect is 
turned off. This “bypass” circuitry typically has high harmonic distortion and minimal 
headroom, both of which can greatly affect the tone and dynamics of your playing. 
Some pedals use a bypass design that loads the guitar signal down even when the 
pedal is switched off. The cumulative effect of these issues can result in a loss of tone, 
dynamics, and high frequency response - even when all your pedals are OFF. 

The Switch Doctor is a true bypass switcher, which means that, when all of the pedal 
loops are switched off, your guitar signal goes directly from the input jack to the output 
jack, bypassing all of the cables, connectors and pedals in the effect chain.* In order 
to achieve a “straight wire” type of true bypass, the Switch Doctor utilizes relays. This 
provides the most transparent bypass possible. However, because relays are 
mechanical switches, it is understood that they inherently cause some noise when 
switching.   

* when the Input Buffer is switched OUT.

Input Buffer

The Switch Doctor features a high quality, discrete, Class A input buffer circuit which 
can help to prevent high frequency losses due to cables and connections. In many 
cases the buffer will improve the overall clarity of tone. However, sometimes a direct 
connection between the guitar and the amplifier is desired. And, some pedal inputs 
(fuzz pedals, etc) are designed such that their tone relies on a direct connection with 
the guitar's pickups. For these reasons, the buffer circuit can be bypassed using the 
BUFFER switch in the upper right corner. Experiment with having the buffer in or out 
and use which sounds best for your setup.

Control Function Switches

The control function switches, SW1 and SW2, can be used for controlling any functions
on an amplifier or an effect device which would normally require a typical on/off 
switch. These switches can be used for amp channel switching in place of the 
amplifier's dedicated footswitch. Each switch can be independently configured to be 
latching or momentary and either normally-open or normally-closed. Refer to 
CONNECTIONS – SW1 and SW2 and SETUP MODE – Fn.1 and Fn.2

A 3

rd

 switch function (SW3) can also be configured by using the 4

th

 pedal bypass loop.  

(see CONNECTIONS – Pedal Loops on page 3). This can be useful for toggling an 
additional amp function such as tremolo or boost. 

MIDI Functions

MIDI Program Changes

MIDI Program Change commands can be used for recalling presets on devices that 

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Содержание Switch Doctor

Страница 1: ...VERSION 2 Features Benefits and Operation 2013 2015 Decibel Eleven ...

Страница 2: ......

Страница 3: ... Preset Mode 11 Direct Mode 13 Pedal Bypass Loops 14 Input Buffer 15 Control Function Switches 15 MIDI Functions 15 MIDI Expression Pedal 16 Setup Mode 17 Programming Presets 22 Factory Reset 24 Specifications 25 Declaration of Conformity Decibel Eleven declares that this product complies with the European Union Council Directives and Standards requirements for the Low Voltage Directive 2006 95 EC...

Страница 4: ...n series to create an expanded setup with more pedal loops and switches Features 128 presets capable of sending Up to 3 MlDl program changes on 3 MlDl channels Up to 8 MlDl continuous controller messages on 2 MlDl channels Up to 8 MlDl Note On messages for triggering samplers Expression Pedal MlDl Continuous Controller Data Up to 4 true bypass pedal effects loops Up to 3 switch control functions f...

Страница 5: ...tching or as an external effect bypass switch The switches can be individually configured as normally open or normally closed with momentary or latching behavior see SETUP MODE Each function switch on the Switch Dr is a single switch with a mono jack Prior to connecting refer to the user manual for the amplifier or effect device and verify the device s footswitch jack configuration for setup as fo...

Страница 6: ...s empty and use the OUTPUT N O jack for the 3rd normally open switch control function Pedal Loop 4 as an A B switch Pedal Loop 4 or Pedal Loop 3 if Pedal Loop4 is used as SW3 can be configured as an A B switch by connecting the loop s SEND jack to destination A and connecting the OUTPUT N O or OUTPUT if using Loop4 as SW3 jack to destination B Placement before amp or in amp effects loop The Switch...

Страница 7: ...l as an expression pedal by connecting with a standard insert cable as shown do not use an active or battery powered pedal A third option for the expression pedal is to use a passive single pole switch in the EXP PEDAL jack This allows for a dedicated switch for sending MIDI Continuous Controller ON OFF messages Use a cable connected as shown below For details on setting up and enabling the expres...

Страница 8: ...REAR PANEL DIAGRAM ...

Страница 9: ...CONNECTION EXAMPLES Fig 1 Basic setup with amp channel switching and MIDI expression pedal Fig 2 Expanded setup with optional multiple pedals per loop and MIDI amp control 7 ...

Страница 10: ...16 MIDI Control or Note messages and 2 MIDI Expression pedals The first unit is set to Preset Mode for selecting presets and the synced second unit is set to Direct Mode for instant access to all of it s loops and switches For even greater flexibility and control this type of setup can also be created using a Decibel Eleven Pedal Palette as the second synced unit ...

Страница 11: ...Control or Note messages and 1 MIDI Expression pedals The Loop Expander is completely controlled through the Switch Dr interface and transparently adds another 4 loops to the Switch Dr setup The Loop Expander can be located underneath the pedals or pedalboard or it can be located remotely in a rack Alternatively the Loop Expander can be wired to handle pedals in the amp s effect loop providing 4 l...

Страница 12: ...TOP PANEL CONTROLS ...

Страница 13: ...t within the bank A B C D Use the and switches in the top row to select the next desired bank When scrolling through the bank numbers a bank is not active until a preset is selected within the bank When there is no preset selected in the bank the blue preset LEDs will sequence from left to right Once a preset is selected it s blue preset LED will light solid and the programmed preset will be activ...

Страница 14: ...onfigured to only send a MIDI Note On message without changing any of the the MIDI Program Changes loops or switch states see PROGRAMMING PRESETS on page 22 for more information For details on enabling MIDI and user options see the SETUP MODE page 17 For preset programming and editing see PROGRAMMING PRESETS page 22 Split Mode Split Mode is an alternative Preset Mode which allows the top row switc...

Страница 15: ...g the bottom row switches 4 3 2 1 The red LEDs above each switch indicate the state of the loops FnS is used for the control function switches SW1 and SW2 The bottom row switches 1 2 control SW1 and switches 3 4 control SW2 Both switches nearest to each indicator LEDs are able to be used to control the switches use either The green status LEDs are located above the footswitches CC A or NT A only a...

Страница 16: ...ggered in Direct Mode are not saved to presets To save Note messages to a preset they must be programmed in PRESET PROGRAMMING see page 22 Pedal Bypass Loops The pedal bypass loops are typically used for inserting or bypassing pedal effects This acts to turn each pedal on or off By having the pedals in the bypass loops presets can be created which can turn on and off multiple pedals with a single ...

Страница 17: ...help to prevent high frequency losses due to cables and connections In many cases the buffer will improve the overall clarity of tone However sometimes a direct connection between the guitar and the amplifier is desired And some pedal inputs fuzz pedals etc are designed such that their tone relies on a direct connection with the guitar s pickups For these reasons the buffer circuit can be bypassed...

Страница 18: ...Note Off message as if a key was quickly pressed and released This helps to prevent stuck notes Most samplers can be set to trigger only with Note On messages ignoring the Note Off see SETUP MODE NT A on page 18 MIDI Expression Pedal Using an expression pedal with the Switch Doctor allows MIDI Continuous Controller data to be sent when the pedal is moved The Continuous Controller Number and the MI...

Страница 19: ...unction PC 1 MIDI Program Change 1 Program Change 1 is fully programmable per preset MIDI messages use numbers 0 to 127 for program changes Since most devices label their presets from 1 to 128 the Switch Doctor displays them as 1 to 128 The actual MIDI message sends as 0 to 127 Switch Dr presets come factory default programmed with PC 1 enabled and set to send a unique MIDI Program Change number 0...

Страница 20: ...r Note Number for this switch Then press the switch to advance to the MIDI Value for this switch whenever the MIDI Value is displayed it is always followed by a decimal point to differentiate it from the MIDI Number Enter the 3 digit value for this switch This is the MIDI Value that will be sent for this message when the switch is ON If it is being used as an ON OFF function switch the value shoul...

Страница 21: ...dal position will be transmitted when a preset is activated Use the switches to set the value When set to no n the pedal value will not be transmitted when a preset is recalled but will be transmitted once the pedal is moved value change Set the transmit value to yes y to have the pedal s position value transmitted when a preset is recalled and also transmitted when the pedal is moved Press the sw...

Страница 22: ...CCb must be defined and enabled before they can be selected here see page 18 Press again to display the preset selection type instant INS or deferred dEF dSP Display The Display setting provides an alternate method of displaying the bank preset when in Preset Mode Press to display the current setting Select BANK ban to show the bank number in the numeric display in Preset Mode default Select PRESE...

Страница 23: ...tch Doctor To cancel the input request press the or switch ddt Data Dump Transmit For transmitting a MIDI data dump of all of the memory including presets and global settings Press the switch to initiate the sending of MIDI sysex data The display will read Out while the red LEDs will cycle from right to left to indicate the data is being transmitted d ty Direct Mode Type PRESS AND HOLD FOR 10 SECO...

Страница 24: ...PC 2 MIDI Program Change 2 Press the switch to edit the MIDI Program Change number to send on the MIDI Channel assigned to Program Change 2 PC2 in Setup Mode To disable sending PC2 for this preset set to OFF PC 3 MIDI Program Change 3 Press the switch to edit the MIDI Program Change number to send on the MIDI Channel assigned to Program Change 3 PC3 in Setup Mode To disable sending PC3 for this pr...

Страница 25: ...s To ignore the pedal bypass loops and create a preset that does not alter their states press switches 1 and 4 simultaneously The numeric display will begin to flash LPS to indicate that the loop states will not be changed with this preset Fns Function Switches Set the function switch states using the bottom row switches 1 and 2 To ignore the function switches and create a preset that does not alt...

Страница 26: ...o switch to exit without saving FACTORY RESET To restore the Switch Doctor to it s factory default settings first disconnect power to the unit Next hold down the and footswitches 2 3 simultaneously while connecting power to the unit The display will scroll factory reset erase all followed by n y Select YES by pressing the footswitch This will erase all presets and will initialize setup functions t...

Страница 27: ... Class A JFET input Input Impedance 1 MΩ Max Input Level 12 dBu Frequency Response 0 0 0 2 dB 10 Hz 100 kHz S N Ratio 96 dB 0 dBV ref no weighting THD N 0 004 10 dBV 20 Hz 30 kHz Output impedance 400 Ω Max Output Level 12 dBu into 10 kΩ Power 9 12 VDC 200 mA center negative 12V DC isolated regulated recommended with Buffer Dimensions 13 2 x 5 x 1 6 W x D x H Weight 3 lbs 25 ...

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