Greyton DRC Hum Prime Tierce Quint Nominal Superquint Double Octave Diameter Heigth Thickness Freq Note Dev Freq Note Dev Freq Note Dev Freq Note Dev Freq Note Dev Freq Note Dev Freq Note Dev 84 72 6.3 239.5 Bb0 47 462 Bb1 -15 578 D2 -27 717 F2 45 952.5 Bb2 37 1400.5 F3 4 1908.5 Bb3 40