Boss BD-2 - Page 6

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LEVEL Knob
This adjusts the volume of the effect sound.
* When this knob is turned counterclockwise,
no sound will be heard.
TONE Knob
This adjusts the tone of sound. Rotating it
clockwise will create sharp sound with
emphasized treble, while turning it
counterclockwise will create soft sound
with cut treble.
GAIN Knob
This adjusts the gain of the blues driver.
Rotating the knob clockwise will increase
the gain creating harder distortion.
LEVEL Knob
GAIN Knob
TONE Knob