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First install the GK-3B divided pickup (optional) on the bass to be 
used. For installation instructions, refer to the GK-3B Owner’s 
Manual.

 

The GK-3B cannot be used with the following basses (the 
pickup will not function properly even when installed).

 

• Basses with an unconventional string configuration, such as 

multi-stringed basses with seven or more strings, or double 
basses (acoustic string basses)

• Nylon-stringed or gut-stringed basses and basses using any 

non-steel strings

• Other basses whose construction does not provide adequate 

space to properly attach the GK-3B

 

With the VB-99, you can assign various different functions to the 
GK-3B’s GK volume control. (p. 77)

You may not be able to control the VB-99’s volume level with the GK 
volume control when another parameter is assigned to the GK 
volume control.

 

As the VB-99 allows you to set the balance between the COSM bass 
and the normal bass volume in each individual patch, we 
recommend that MIX be the basic function used for the select switch.

Also note that if a parameter other than volume is assigned as the 
GK volume control function, the GK-3B’s select switch will stop 
functioning normally.

To perform with the VB-99, first set up the following devices.

• A bass on which the GK-3B has been installed or equipped with 

internal GK function

• Bass amp/speaker or headphones

Performing can be made even more convenient using the following 
devices:

• MIDI foot controller (Roland FC-300; optional)
• Expression pedal (Roland EV-5 or BOSS FV-500L/500H with a 

connection cable (stereo 1/4” phone – stereo 1/4” phone); 
optional)

• Pedal switch (BOSS FS-5U or FS-6; optional)

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