THE OLD BLOOD NOISE ENDEAVORS SIGNAL BLENDER is a box with a simple set of retractions applicable in myriad ways. t can go.three places: Three things can do to the Output: HEE, and Input. The three volume knobs control the volume of and a boosted version. of the Input (“CHEER . Three foot switches do all the routing: Foot switch A sends Input to to Output through the A volume control, Footnote Sends Input to BEEN and REVERE to Quip through the B volume control.