Manual

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bb' = 442.00 Hz * 12 2 = 468.28 Hz
b' = 468.28 Hz * 12 2 = 496.13 Hz
etc.
3.2 THE CENT VALUE
Cent is a value for proportions of frequencies. A semi- tone is geometrically divided into 100 parts (
= 100 cent). The following example will show how the cent-value is defined mathematically. The
frequency of oscillations is given with 440.0 Hertz and is to be increased by 1 cent:
440.00 Hz * 1200 2 = 440.26 Hz
The frequency of oscillation is given with 440.00 Hertz is to be increased by 5 cent.
440.00 Hz * (1200/5) 2 = 441.27 Hz
The frequency of 440.00 Hertz is to be increased by 100 cent (= 1 semi-tone).
440.00 Hz * (1200/100) 2 = 440.00 Hz * 12 2 = 466.16 Hz
The frequency of 466.16 Hertz is to be lowered by 100 cent (= 1 semi-tone).
466.16 Hz : (1200/100) 2 = 466.16 Hz : 12 2 = 440.00 Hz
3.3 NOMINAL FREQUENCY GENERATION OF TUNING SET CTS-5
Tuning Set CTS-5 contains a microprocessor which generates the nominal frequency (f)
according to the following equation.
c: "cent" - presetting (+-99.5)
n: number of tone (a=0, bb=1, ... g#=11)
k: standard pitch presetting (380.0 ... 470.0 Hz)
o: octave (1=A2/110Hz, 2=A1/220Hz, ... 6=a4/3520Hz)
n c
o + ---- + -----
k 12 1200
f = --- * 2
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