Tuning theory
How a tuner works, what Hz are, equal temperament and everything behind tuning.
How a Guitar Tuner Works: Pitch Detection Explained
How a guitar tuner works: it captures the sound, measures the fundamental frequency with pitch detection, and shows you in cents if you're flat or sharp.
Hertz and Musical Notes: What Is A440?
What A440 is and why A4 is the international standard: hertz as vibrations per second, how the octave doubles, and the 432 and 442 Hz alternatives.
Equal Temperament vs. Just Intonation
Equal temperament divides the octave into twelve equal half steps: here's why guitar and piano use it, and how it differs from just intonation.
Why Does a Guitar Go Out of Tune on Its Own?
Why does a guitar go out of tune on its own, even when you're not playing it? Temperature, humidity, nut friction, and loose tuners: causes and fixes.
How to Choose a Guitar Tuning for Your Voice
How to choose a guitar tuning for your voice: find your comfortable highest note, then use a capo to go up or a lower tuning to bring the key down.