That strange phenomenon where air molecules bounce against each other in a way that somehow comforts you, makes you cry, or makes you dance all night: music. Since the advent of recorded audio, a musician doesn't even need to be present anymore for this to happen (which makes putting "I will always love you" on repeat a little less awkward). Musicians and sound engineers have found many ways of creating music, and making it sound good. Some of their methods have become industry staples used on every recording released today. Let's look at what they do and reproduce some of their methods in Ruby!