1. IN A PIPE ORGAN HAVING A WINDCHEST WITH PIPES THEREON ARRANGED IN STOPS OVER SERIES OF ORIFICES, COMPRESSED AIR CONTROL TO SAID ORIFICES, AND SELECTIVE CONTROL MEANS FOR MANIPULATION OF SAID COMPRESSED AIR CONTROL; THE IMPROVEMENTS IN SAID COMPRESSED AIR CONTROL INCLUDING INTERSECTING CONTROL STRIPS SUPERIMPOSED ON ONE ANOTHER AT THE AREAS OF THEIR INTERSECTION, EACH AREA OF INTERSECTION BEING IN REGISTRY WITH ONE OF SAID ORIFICES, SAID INTERSECTING STRIPS BEING MOVABLE RELATIVELY TO ONE ANOTHER AND RELATIVELY TO THE RESPECTIVE ORIFICES AND HAVING AIR CONDUCTING APERTURES THERETHROUGH REGISTERABLE WITH THE RESPECTIVE ADJACENT ORIFICES, MEANS TO URGE SAID STRIPS INTO RESPECTIVE INITIAL POSITIONS WITH SAID APERTURES OFFSET FROM THE RESPECTIVE ORIFICES, AND MEANS CONNECTING EACH INTERSECTING STRIP TO THE RESPECTIVE CONTROL MEANS FOR SELECTIVELY SHIFTING THE RESPECTIVE STRIPS INTO POSITION WHEN SAID RESPECTIVE CONTROL MEANS ARE MANIPULATED SO AS TO REGISTER THE RESPECTIVE APERTURES OF SAID STRIPS WITH THE RESPECTIVE ADJACENT ORIFICES AT SAID AREA OF INTERSECTION FOR ADMITTING COMPRESSED AIR TO THE RESPECTIVE PIPES.