       if ( now < 0 ) now = -now;
       avg = (15 * avg + now) / 16;
       val = ABS(avg-prev);
-      shiftLeft(  128>>val ); 
+      shiftLeft(  128>>val );
+      if ( button() )
+        avg = 0;
       tone(100*val);    
       prev = avg;
     }

      else
      {
        shiftLeft(0); // blank line
        tone(500);
      }
      if ( ++j > 5 ) // next character

**/
void loop()
{
  int a =0, i=0, j=0, now=0, avg=0, prev=0, val=0;
  sineWave();
  for(i=0;i<20;i++)
   tone(500*i);
