This is sent to play a sound effect

Offset Type     Name             Description
------ -------- ---------------- ------------------------------
 0000  BYTE     cmd
 0001  BOOL     singular         if false, the sound repeats indefinitely
 0002  USHORT   effect           the sound effect number
 0004  USHORT   volume           changing it seems to have no effect
 0006  USHORT   x                the X-axis position from which the sound originates
 0008  USHORT   y                the Y-axis position from which the sound originates
 0010  USHORT   z                the Z-axis position from which the sound originates