SeekMusic(id, pos)
id. The music object does not have to be playing. If the
music is playing and you call SeekMusic(), it will immediately skip
to the specified position. The position is specified in milliseconds.
Thus, if you want to skip to the position 3:24, you would have to
pass the value 204000 because 3 * 60 * 1000 + 24 * 1000 = 204000.
Note that seeking Protracker modules to a certain position will only
work if you set the TimedProtracker tag to True in OpenMusic()
or in @MUSIC.