Musical Note Frequencies

Reference A = 440.00Hz
{middle-C} = 261.63Hz

A     27.50   b55.00  g110.00   220.00   440.00   880.00  1760.00  3520.00
A#/Bb 29.14    58.27   116.54   233.08   466.16   932.33  1864.66  3729.31
B     30.87    61.74   123.47  g246.94   493.88   987.77  1975.53  3951.07
C     32.70    65.41   130.81  {261.63}  523.25  1046.50  2093.00  4186.01
C#/Db 34.65    69.30   138.59   277.18   554.37  1108.73  2217.46  4434.92
D     36.71   b73.42  g146.83   293.66   587.33  1174.66  2349.32  4698.64
D#/Eb 38.89    77.78   155.56   311.13   622.25  1244.51  2489.02  4978.03
E    b41.20   g82.41   164.81  g329.63   659.26  1318.51  2637.02  5274.04
F     43.65    87.31   174.61   349.23   698.46  1396.91  2793.83  5587.65
F#/Gb 46.25    92.50   185.00   369.99   739.99  1479.98  2959.96  5919.91
G     49.00   b98.00  g196.00   392.00   783.99  1567.98  3135.96  6271.93
G#/Ab 51.91   103.83   207.65   415.30   830.61  1661.22  3322.44  6644.88

The low E on a four string bass guitar is 41.2Hz
The low E on a tenor guitar is 87.31Hz 82.41Hz

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This table was generated from a BASIC programme using the “twelfth root of two” relation (twelve notes in an octave):

f = octave x 27.5 x 2^(note/12)

Use these frequencies with a little caution. There is a musical consideration called temprament which applies particularly to pianos and organs.

To temper a piano tuning is to very slightly de-tune the notes for the best musical compromise for all the note relationships in every musical key.

A piano tuned with a frequency counter strictly following the table above will sound unexciting and somewhat sour in tune. This is the general problem of electronic keyboards that use a single master oscillator-divider tone source.

Tempering adjusts the degree of dissonance between the notes until a musically agreeable result is obtained in all musical keys.

It is possible for temprament to be set, or the tuning to “drop” to favor some musical keys over others.

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AP Instrument Tuner v1.02 for your computer desktop (W95 okay).

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