I am using iTunes to play music at parties. I would like to have another player running at the same time but playing music through headset, so I can review/decide what to play next while iTunes currently outputs through audio out. This player should be able to allow me to choose which sound output device to use independently from default device. Preferrably the player should be able to share iTunes library. MegaSeg can do this (I think) but it is pricey. Any suggestions?