Playsound - Big problem

In the the end of my adventure map, i did a command to play a song at the player

BUT, if the player move too far, he can't listen the song

I know there is the tag [minimumVolume], but it is not enough

Please do a tag for /playsound for hear the song during in a biggest distance

ex:
/playsound <sound> <player> [x] [y] [z] [volume] [pitch] [minimumVolume] [ray]