Simon's Town DRC Hum Prime Tierce Quint Nominal Superquint Double Octave Diameter Height Thickness Freq Note Dev Freq Note Dev Freq Note Dev Freq Note Dev Freq Note Dev Freq Note Dev Freq Note Dev 49 37 4.2 142 Db0 42 283.5 Db1 39 351 F1 8 423.5 Ab1 33 563 Db2 26 1125.5 Db3 25