Intensity rate of change control for musical instruments

Claim 1

IN AN ELECTRICAL MUSICAL INSTRUMENT, APPARATUS FOR CONTROLLING THE RATE OF CHANGE OF MUSIC INTENSITY COMPRISING, A SOURCE OF AN ELECTRICAL MUSICAL SIGNAL, VARIABLE GAIN AMPLIFYING MEANS RESPONSIVE TO SAID ELECTRICAL MUSICAL SIGNAL FOR PROVIDING AN OUTPUT SIGNAL, TRANSDUCING MEANS RESPONSIVE TO SAID OUTPUT SIGNAL FOR PROVIDING CORRESPONDING PRESSURE VARIATIONS, A CAPACITOR, MEANS FOR COUPLING THE POTENTIAL ACROSS SAID CAPACITOR TO SAID AMPLIFYING MEANS TO CONTROL THE GAIN THEREOF, A SOURCE OF A FIXED POTENTIAL, RESISTIVE MEANS CONNECTED TO SAID FIXED POTENTIAL SOURCE, A MOVABLE ARM FOR SELECTIVELY EXCHANGING CHARGE BETWEEN SAID CAPACITOR AND SAID SOURCE THROUGH SAID RESISTIVE MEANS, THE RESISTANCE OF THE LATTER BETWEEN SAID FIXED POTENTIAL SOURCE AND SECOND CAPACITOR BEING RELATED TO THE POSITION OF SAID ARM ALONG A PATH INCLUDING POINTS OF CONTACT WITH SAID RESISTIVE MEANS, WHEREBY SAID CAPACITOR CHARGES TOWARD SAID FIXED POTENTIAL AT A RATE DETERMINED BY THE TIME CONSTANT OF SAID RESISTANCE AND SAID CAPACITOR, MEANS FOR CONTROLLING MOVEMENT OF SAID ARM ALONG SAID PATH, SAID PATH INCLUDING A NEUTRAL POSITION DISCONNECTED FROM SAID RESISTIVE MEANS, AND MEANS FOR MAINTAINING SAID ARM IN SAID NETURAL POSITION TO THEN MAINTAIN SAID GAIN AT A VALUE DETERMINED BY THE POTENTIAL ON SAID CAPACITOR AT THE TIME SAID ARM IS MOVED TO SAID NETURAL POSITION.