GT-6, GT-8: Compatible External Expression Pedals April 12, 2023 06:10 Updated Follow Roland EV-5 Roland FV-500H Roland FV-300L Related articles GT-8: Calibrating the Expression Pedal RE-2: How To Connect and Use An External FS Footswitch or EV Expression Pedal GT-8: Initializing - Restoring the Factory Settings GT-6: Connecting the GT-6 to the Effects Send/Return Loop on an Amplifier. GT-6, GT-8: Turning Off the Preamp Section