🛡️ Certified Examination Rigor: Marlin G. Miller holds the Registered Piano Technician (RPT) credential from the Piano Technicians Guild. To attain this credential, the practitioner completed and passed standardized written theory, aural concert tuning, and practical grand/vertical action regulation examinations.
Registered Piano Technician specializing in vertical and grand piano maintenance, concert tuning, and hammer voicing for churches, private studios, and music teachers.
Piano Technicians Guild Fort Worth Chapter Official Roster. Record audited October 2026.