Music used to be created in recording studios, first using analog tape and eventually moving to digital tracks. In the twenty-first century, musicians do not need a recording studio to create music; all they need is a computer and some passion. Those with an interest in coding and a talent for music can use Sonic Pi, a live coding environment based on the Ruby programming language, to create simple tunes or masterful compositions. This lively guidebook offers a series of unique activities, starting with live loops and progress to using envelopes and samples, to start readers on a musical coding journey.