Yes, the excitement is in the composition, but mixing really does matter when it comes to the end results! In reality, of course, you could and perhaps should be mixing as you arrange, but for this tutorial we’re going to focus on just the mixing process, really to show how important a role it plays.
Mixing your music correctly can seem like a laborious task after the excitement of getting your initial ideas into some loops, and then expanding those loops into an arrangement, so it can often be seen as the boring process.