https://guitar.earo.app/ 2026-05-15 weekly 1.0 https://guitar.earo.app/science 2026-05-15 weekly 0.9 https://guitar.earo.app/privacy_policy.html 2026-05-15 yearly 0.3 https://guitar.earo.app/account_deletion.html 2026-05-15 yearly 0.3 https://guitar.earo.app/science/anatomy-of-tone 2026-05-15 monthly 0.8 https://guitar.earo.app/assets/site-cards/site-card-v5.png Anatomy of Tone: The Three Building Blocks