+-------- SPAWNFLAGS --------
+LOOPED_ON: the sound is looped and initially plays (the sound file MUST have the LOOP_START vorbis comment then!). It can be toggled by a trigger.
+LOOPED_OFF: the sound is looped and initially does not play (the sound file MUST have the LOOP_START vorbis comment then!). It can be toggled by a trigger.
+GLOBAL: the sound plays with no attenuation (same as setting atten to -1)
+ACTIVATOR: the sound is played to the activator only when triggered (cannot be combined with LOOPED_ON and LOOPED_OFF)