Applied Guitar Theory Promo Codes & Coupons September 2026 — Up to 30% Off

In addition to the obvious reason that playing the guitar out of tune could make it sound terrible, there is another important reason to always keep it in tune. When you play Applied Guitar Theory guitar, you teach your ear to recognize relationships between notes. A melody or harmony can include these notes. Whether the notes are played one at a time or all at once, your ears are picking up on the subtleties of how they should sound in each situation. Applied Guitar Theory is essential to keep your guitar in tune in order to provide good information to your ears. Always check the guitar's tuning before you play a single note to ensure that it is in tune before you begin playing or practicing. Your ear will get better over time to the point where you can spot tuning issues right away and fix them right away.