Activation sounds play when either a switch or an object is operated.
Place a Switch somewhere in the map, and tag it
[ActivationSound,Channel]. Every time the Switch is pressed, the
ActivationSound will play. If you don't want the Switch to activate any effects, give the
Channel a unique value. If the
Channel is not given a value, the Switch will not function at all.
M[StopSound,StartSound] within a functioning sector (this works with most effects). When the sector's function is activated, the sounds will play.
StartSound are the most common values, but not entirely consistent.