FL Studio allows users to mute many different aspects of their projects. It gives you the most versatile options, meaning that you can continually hone in on the element that you want to listen to, such as vocals or chords.  It can be slightly overwhelming for new Fruity Loops users to see how many different ways you can mute various aspects of your project. If you can't hear a specific part of your song, it can be tricky to know where to look to unmute it.  However, this is something you will learn over time, and hopefully, this article can help those users!