Adding music buttons

im using sdk3 but i cant figure out how to make buttons activate music i know how to put music in and have it play when i load into the world but i cant get the buttons to work to change the song so basically the button wont turn on and off the song its set to. btw im as new as it gets to creating anything sorry lol. i have multiple audio sources set up for the music i just cant get it to work with the button. plz help