If you want party music, play buttons 1 and 4. If you want calm music, play buttons 2 and 3. If you don't want an instrument to loop, just click on it and it will only repeat 10 times. If you want to stop just one sprite, press the mini stop sign right under the sprite. Same with if you want an instrument to loop. press the green button under the sprite you want to loop. If you want to stop the background music, just press the number of the button.