Press M or the mute button to change between 0%, 33%, 66%, or 100% volume. Pressing 0, 1, 2, or 3 will also change volume Just backpack the code into one of you projects! You can use it in any of your projects! (Credit preferabal)
The song I used is Cereal Killa - Blue Wednesday You just need to switch the code that plays the music to the mute button sprite for it to work.