Best Way Play/Preload/Load Music ?

I have some Problems with Music and Sound. If you die in my Platform Game,the Gameover Music should Play and the current Level/Stage Music must stop and if u load than it continue. But it don't work. I can't pause or stop the Music. Also i want to preload Sounds cuz they need to long to load. Have someone any Solutions ? I use node-webkit

In every Level i have placed this Obj

This is what happening if u die

Thats how my Loader Layout should Load but nothing happening.

Place the music in the soundfolder. Then it should preload.

Place the music in the soundfolder. Then it should preload.

Wow thank you very much it works

Okay another Problem. If i die the Gameover Music starts but the current Stage Music don't pause/stop. Any Ideas how make that the Stage Music Continue Playing after Gameover Music.

Nobody can help me to make Gameover Music ???

A litte push because i can't figure it out (I hope it's allowed)

make sure you tell it which sounds to stop, or do stop all, instead of stop ""