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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Musical Scales
In music, a scale is a group of musical notes collected in ascending and descending order that provides material for or is used to conveniently represent part or all of a musical work including melody and/or harmony.[1] Scales are ordered in pitch or pitch class, with their ordering providing a measure of musical distance. The distance between two successive notes in a scale is called a scale step. - Wikipedia

Equal Tempered Chromatic (Musical Note) Scale

 
International Pitch, adopted 1891: A4 = 435

American Standard pitch, adopted by the ASA* in 1936:Aq = 440

Note Aq (Hz) A4 (Hz) Note Aq (Hz) A4 (Hz) Note Aq (Hz) A4 (Hz)
C0 16.35 16.17 A2 110.00 108.75 F#5 739.99 731.58
C#0 17.32 17.13 A#2 116.54 115.22 G5 783.99 775.08
D0 18.35 18.15 B2 123.47 122.07 G#5 830.61 821.17
D#0 19.45 19.22 C3 130.81 129.33 A5 880.00 870.00
E0 20.60 20.37 C#3 138.59 137.02 A#5 932.33 921.73
F0 21.83 21.58 D3 146.83 145.16 B5 987.77 976.54
F#0 23.12 22.86 D#3 155.56 153.80 C6 1046.50 1034.61
G0 24.50 24.22 E3 164.81 162.94 C#6 1108.73 1096.13
G#0 25.96 25.66 F3 174.61 172.63 D6 1174.66 1161.31
A0 27.50 27.19 F#3 185.00 182.89 D#6 1244.51 1230.37
A#0 29.14 28.80 G3 196.00 193.77 E6 1318.51 1303.53
B0 30.87 30.52 G#3 207.65 205.29 F6 1396.91 1381.04
C1 32.70 32.33 A3 220.00 217.50 F#6 1479.98 1463.16
C#1 34.65 34.25 A#3 233.08 230.43 G6 1567.98 1550.16
D1 36.71 36.29 B3 246.94 244.14 G#6 1661.22 1642.34
D#1 38.89 38.85 C4 261.63 258.65 A6 1760.00 1740.00
E1 41.20 40.74 C#4 277.18 274.03 A#6 1864.66 1843.47
F1 43.65 43.16 D4 293.66 290.33 B6 1975.53 1953.08
F#1 46.25 45.72 D#4 311.13 307.59 C7 2093.00 2069.22
G1 49.00 48.44 E4 329.63 325.88 C#7 2217.46 2192.26
G#1 51.91 51.32 F4 349.23 345.26 D7 2349.32 2322.62
A1 55.00 54.38 F#4 369.99 365.79 D#7 2489.02 2460.73
A#1 58.27 57.61 G4 392.00 387.54 E7 2637.02 2607.05
B1 61.74 61.03 G#4 415.30 410.59 F7 2793.83 2762.08
C2 65.41 64.66 A4 440.00 435.00 F#7 2959.96 2926.32
C#2 69.30 68.51 A#4 466.16 460.87 G7 3135.96 3100.33
D2 73.42 72.58 B4 493.88 488.27 G#7 3322.44 3284.68
D#2 77.78 76.90 C5 523.25 517.31 A7 3520.00 3480.00
E2 82.41 81.47 C#5 554.37 548.07 A#7 3729.31 3686.93
F2 87.31 86.31 D5 587.33 580.66 B7 3951.07 3906.17
F#2 92.50 91.45 D#5 622.25 615.18 C8 4186.01 4138.44
G2 98.00 96.89 E5 659.26 651.76      
G#2 103.83 102.65 F5 698.46 690.52      

*ASA = American Standards Association

Information from CRC Handbook of Chemistry and Physics, 7first Edition, 1990-1991, David R. Lide
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