Stop Previous Music
The stop_previous_music variable is used to specify whether the previous
music track being played should be stopped or not; it accepts either a true or
false value. If it is set to false then when the previous area is re-entered the
music will not play from the start again, this is usually used in secret areas so
that the music does not reset everytime a secret is entered. However, if it is
set to true then the music will restart from the beginning when the previous area
is re-entered. The default value for this variable is true, so if the variable is
left unset then the previous music track will be set to stop when entering the
area.