Switch class public functions 
 
 
 Additional functions inherited from 
   Filter.
-   Switch(int switchSample); 
-  switchSample is the sample at which time the inputs[1] will 
     replace inputs[0] in the output() function.
-   ~Switch(); 
-  Does nothing.
-   void action(void); 
-  ticks the currently selected input.  Other input is left dormant.
-   int getDurationSamples(void); 
-  Returns the duration that the inputs[0] will be selected 
     in output().
-   sampleType output(int index); 
-  Returns inputs[0] if periodCounter is less than period, otherwise
     inputs[1] will be returned.
-   void setDurationSamples(int switchSample); 
-  Set the sample length that inputs[0] will be active before
     inputs[1] will be used.
-   void tick(long newTickNumber); 
-  Overrides the Filter tick() function.  Will only tick the active
     input, (either 0 or 1).
-   void trigger(void); 
-  Resets the periodCounter.  inputs[0] will be read until
     periodCounter >= period.