Probably suggested before~
Some other games have this also but I feel people would enjoy having an in-game MP3 player for their own music while they play SK. Simply, it would be like having a file in the SK directory labeled something like "MP3_Player" and this would be the folder people place their own .mp3 music into. Then when launching the game the game would read that folder and allow the music inside of it to be played with the in-game MP3 player. An addition to the game that players would enjoy without having to use excess computer resources to open their internet browser or music program to play their own music outside of SK.
I already play my own music, I just use iTunes. The only case where I feel this would help is those who are in fullscreen and don't want to deal with the delay period when you alt-tab in fullscreen.