Boss Audio Systems GT-6 User Manual

If there is no sound or other operational problems occur, first 
check through the following solutions. If this does not 
resolve the problem, then contact your dealer or a nearby 
Roland service station.

❍ Are the connection cables broken?
→ Try using a different set of connection cables.

❍ Is the GT-6 correctly connected to the other devices?
→ Check connections with the other devices (p. 12).

❍ Is the connected amp/mixer turned off, or the volume 

lowered?

→ Check the settings of your amp/mixer system.

❍ Is the OUTPUT LEVEL knob lowered?
→ Adjust the OUTPUT LEVEL knob to an appropriate 

❍ Is Tuner/Bypass set to On?
→ When the volume is set to “Mute” in the Tuner/Bypass 

mode, even the direct sound will not be output by 
setting the Tuner/Bypass to “On” (p. 58).

❍ Is each effect set correctly?
→ Use the “Meter function” (p. 60) to check the output level 

of each effect. If there is an effect for which the meter 
does not move, check the settings for that effect (p. 24).

❍ Is “FV: Level” or “MST: Patch Level” specified as a pedal 

assign Target?

→ Move the controller to which it is assigned.

❍ Is the power to the external device connected to the 

SEND/RETURN jack off, or is the volume of the device 
turned down?

→ Check the settings for the connected device.

❍ Could you be using a connection cable that contains a 

resistor?

→ Use a connection cable that does not contain a resistor.

❍ Is something other than the Play screen shown in the 

display?

→ On the GT-6, patches can be selected only when the Play 

screen is displayed. Press [EXIT] to return to the Play 
screen (p. 13).

❍ Could the effect be switched off?
→ To control a parameter using the expression pedal or 

CTL pedal, make sure the effect that contains the 
parameter you intend to control is switched on.

❍ Is something other than “Assignable” selected for the 

SUB CTL 1,2 function setting?

→ When operating a foot switch connected to the SUB 

EXP/SUB CTL 1, 2 jack, set the SUB CTL 1, 2 function (p. 
63) to “Assignable.”

❍ Do the MIDI channel settings of both devices match?
→ Make sure that the MIDI channels of both devices match 

❍ Do the controller nimber settings of both devices match?
→ Make sure that the controller nimber of both devices 

❍ Are the MIDI cables broken?
→ Try another set of MIDI cables.

❍ Is the GT-6 correctly connected to the other MIDI device?
→ Check connections with the other MIDI device.

❍ Do the MIDI channel settings of both devices match?
→ Make sure that the MIDI channels of both devices match 

❍ When you send messages from the GT-6, make sure the 

GT-6 is set to the settings appropriate for sending data.

→ Check the on/off status (p. 66) for transmission of 

program change messages and the settings for the 
controller numbers to be transmitted (p. 66) .