1. IN COMBINATION WITH A PORTABLE ACCORDION HAVING TWO REED CARRYING HEADS AND AN INTERPOSED BELLOWS, ONE OF SAID HEADS HAVING THE REAR THEREOF FOR ENGAGEMENT WITH THE BODY OF THE PLAYER DURING PLAYING OF THE ACCORDION AND THE OTHER HEAD BEING MOVABLE WITH RESPECT TO SAID ONE HEAD, APPARATUS FOR CONTROLLING THE RELATIVE MOVEMENT OF SAID OTHER HEAD WITH RESPECT TO SAID ONE HEAD COMPRISING A FIRST VERTICALLY ELONGATED UNITARY BRACKET MEMBER MOUNTED ON THE REAR OF SAID ONE OF SAID HEADS; SAID FIRST BRACKET MEMBER HAVING A PLATE PORTION DISPOSED AT AN ANGLE TO THE REAR OF SAID ONE OF SAID HEADS TO SPACE THE BELLOWS FROM THE BODY OF THE PLAYER, A SECOND VERTICALLY ELONGATED UNITARY BRACKET MEMBER MOUNTED ON THE REAR OF SAID OTHER OF SAID HEADS, A VERTICAL ROD CARRIED BY EACH OF SAID BRACKET MEMBERS, AND A PLURALITY OF PIVOTALLY CONNECTED LINKS HAVING PORTIONS PIVOTALLY CONNECTED TO SAID RODS AND PORTIONS SLIDABLY AND PIVOTALLY CONNECTED TO SAID