• derived nodes inherit all messages from their base classes
  
• see reset method for default settings
  
• the volume of a sound is the region in which the sound will play at 100% amplitude(loudness)
  
• falloffDistance is a region outside the volume in which the amplitude is diminished as the user moves further away from the source(volume)
  
• the sound server, snerd, must be run on the a local or remote machine
  
• sounds under a switch will turn off but must be restarted when the switch is toggled back on
  

constructor amplitude

destructor ~amplitude

method reset

1 reset playing flag to false
2 set threshold to 0.2
3 set filter to 0.8
4 set current amplitude to 0.0
5 set update interval to 0.05
6 if a sample exists then delete it

method message

1 set the minimum amplitude threshold
2 set the first order filter constant (percent contribution)
3 start monitoring the input signal
4 stop the playing sound
5 set the update interval for sound server

method setDistance

method setAmplitude

method setFalloffDistance

method setAttenuation

method isPlaying

method isPaused

method play

1 if no sample then create a new bergenAmplitude
2 play the sample
3 generate a heartbeat for the server

method pause

method stop

1 if a sample is playing

1.1 send a stop command to the server

method app

1 if a sample exists

1.1 generate a heartbeat for the server
1.2 if the sample is playing

1.2.1 if update interval has passed then update sound server

1.2.1.0.1 generate changed event with $value

1.2.1.1 determine position of this sound
1.2.1.2 get position relative to CAVE