play()

Plays the current sound once.

stop()

Stops the sound from playing.

setVolume(level)

Sets the volume of the sound, where level is between 0 (silent) and 1 (full).

setPan(pos)

Sets the left/right pan of the sound, where pos is between -1 (left) and 1 (right).  Not applicable to positioned sounds.

frequency

Integer value that determines the frequency (Hz) the sound is played at (useful to modify this for engine notes).  If coming from a floating point value, use Math.floor(fVal) to get a usable integer for this function.

setPolyphony(nVoice)

Sets the sound to allow playback through a number of voices at once (defaults to 1).  2 would allow two copies of the sound to play at once, etc.

duration

Returns a float for the duration of the sound in seconds.