In music, keys are tied to pitches.
And although that might sound difficult, it’s not. Really.
Concert pitch is measured in Hertz or cycles per second, and since 1936, the note A above middle C is pegged at a frequency of 440Hz.
- There is even an international standard for this (ISO16:1975) — get it here.
You are not even supposed to care about this, you are not even supposed to know about this. It is a standard, a benchmark, a LAW, taken as read — this is a given — except…
Sometimes a piece of recorded music is slowed down or speeded up, and A4 is no longer 440Hz, and in fact is between the tone and the next semitone — in no man’s land.
I bloody hate that.
For example, my wife noticed that on the Liberty X CD (Being Somebody, 2003, V2) the third track is out of standard pitch. It turned out to be almost exactly between F#m and Gm. A quarter tone! So should it be higher in pitch, the G minor — or lower and F# minor? Which was the original key when they recorded it? Well, the second track, “Jumpin” is G# minor — and so’s the fifth track, “Watcha Doin Tonight?”, so I figured it might be a good bet that it was G minor.
So what I do is rip my CDs to an MP3s (or download the MP3s; whatever), then change the pitch in Audacity (free software) using skill and judgement and a guitar correctly tuned to concert pitch, and then export to MP3 again.
You needed to get LAME so that Audacity would let you export to MP3 fromat, but the results were superb — an altered pitch, without altering the beats per minute!
Anyways, recently my corrections have been shockingly bad quality… and so I am gutted that I have to save as a huge WAV file and then use the free version of NCH’s “Switch” to make the MP3. It’s an extra step I could do without!
Back at the Liberty X track — the quarter tone up to Gm made the voices sound too high, so I dropped the track to F#m in Audacity, and it was spot on!
What the pluck is the good of doing that to a record — it means you cannot play a piano along with it, and you have to retune your guitar all the time. This is why it is so difficult for people to learn music by ear! Aaargh!
Having a list of musical frequencies and wavelengths is a must, I canny find anything on the web, so I have nicked the following from an old text book.
The Definitive Frequencies List:
Note |
Frequency (Hz) |
Wavelength (mm) |
voice |
C0 |
16.35 |
21 000 |
|
C#0/ Db0 |
17.32 |
19 900 |
|
D0 |
18.35 |
18 700 |
|
D#0/ Eb0 |
19.45 |
17 700 |
|
E0 |
20.60 |
16 700 |
|
F0 |
21.83 |
15 800 |
|
F#0/ Gb0 |
23.12 |
14 900 |
|
G0 |
24.50 |
14 000 |
|
G#0/ Ab0 |
25.96 |
13 200 |
|
A1 |
27.50 |
12 500 |
|
A#1/ Bb1 |
29.14 |
11 800 |
|
B1 |
30.87 |
11 100 |
|
C1 |
32.70 |
10 500 |
|
C#1/ Db1 |
34.65 |
9 960 |
|
D1 |
36.71 |
9 400 |
|
D#1/ Eb1 |
38.89 |
8 870 |
|
E1 |
41.20 |
8 370 |
|
F1 |
43.65 |
7 900 |
|
F#1/ Gb1 |
46.25 |
7 460 |
|
G1 |
49.00 |
7 040 |
sub-bass, contrabass, or basso profundo:
lower than G1 |
G#1/ Ab1 |
51.91 |
6 650 |
|
A2 |
55.00 |
6 270 |
|
A#2/ Bb2 |
58.27 |
5 920 |
|
B2 |
61.74 |
5 590 |
Tenor: B2 – G4
Operatic Tenor: B2 – C5 |
C2 |
65.41 |
5 270 |
Bass: C2 – C4 |
C#2/ Db2 |
69.30 |
4 980 |
|
D2 |
73.42 |
4 700 |
|
D#2/ Eb2 |
77.78 |
4 440 |
|
E2 |
82.41 |
4 190 |
Operatic Bass – Basso: E2 – F4 |
F2 |
87.31 |
3 950 |
Operatic Baritone: F2 – G4
Baritone: F2 – F4 |
F#2/ Gb2 |
92.50 |
3 730 |
|
G2 |
98.00 |
3 520 |
|
G#2/ Ab2 |
103.83 |
3 320 |
|
A3 |
110.00 |
3 140 |
Mezzo- Soprano: A3 – F5 |
A#3/ Bb3 |
116.54 |
2 960 |
|
B3 |
123.47 |
2 790 |
|
C3 |
130.81 |
2 640 |
|
C#3/ Db3 |
138.59 |
2 490 |
|
D3 |
146.83 |
2 350 |
|
D#3/ Eb3 |
155.56 |
2 220 |
|
E3 |
164.81 |
2 090 |
Alto: E3 – E5 |
F3 |
174.61 |
1 980 |
Operatic Contralto: F3 – A5 |
F#3/ Gb3 |
185.00 |
1 860 |
|
G3 |
196.00 |
1 760 |
Operatic Mezzo- Soprano: G3 – B5 |
G#3/ Ab3 |
207.65 |
1 660 |
|
A4 |
220.00 |
1 570 |
|
A#4/ Bb4 |
233.08 |
1 480 |
|
B4 |
246.94 |
1 400 |
|
“Middle” C4 |
261.63 |
1 320 |
Bass: C2 – C4
Soprano C4- A5
Operatic Soprano: C4 – C6 |
C#4/ Db4 |
277.18 |
1 240 |
|
D4 |
293.66 |
1 170 |
|
D#4/ Eb4 |
311.13 |
1 110 |
|
E4 |
329.63 |
1 050 |
|
F4 |
349.23 |
988 |
Operatic Bass – Basso: E2 – F4
Baritone: F2 – F4 |
F#4/ Gb4 |
369.99 |
932 |
|
G4 |
392.00 |
880 |
Operatic Baritone: F2 – G4
Tenor: B2 – G4 |
G#4/ Ab4 |
415.30 |
831 |
|
A5 |
440.00 |
784 |
Operatic Contralto: F3 – A5
Soprano C4- A5 |
A#5/ Bb5 |
466.16 |
740 |
|
B5 |
493.88 |
699 |
Operatic Mezzo- Soprano: G3 – B5 |
C5 |
523.25 |
659 |
Operatic Tenor: B2 – C5 |
C#5/ Db5 |
554.37 |
622 |
|
D5 |
587.33 |
587 |
|
D#5/ Eb5 |
622.25 |
554 |
|
E5 |
659.26 |
523 |
Alto: E3 – E5 |
F5 |
698.46 |
494 |
Mezzo- Soprano: A3 – F5 |
F#5/ Gb5 |
739.99 |
466 |
|
G5 |
783.99 |
440 |
|
G#5/ Ab5 |
830.61 |
415 |
|
A6 |
880.00 |
392 |
|
A#6/ Bb6 |
932.33 |
370 |
|
B6 |
987.77 |
349 |
|
C6 |
1046.50 |
330 |
Operatic Soprano: C4 – C6 |
C#6/ Db6 |
1108.73 |
311 |
sopranino: higher than C#6 |
D6 |
1174.66 |
294 |
|
D#6/ Eb6 |
1244.51 |
277 |
|
E6 |
1318.51 |
262 |
|
F6 |
1396.91 |
247 |
|
F#6/ Gb6 |
1479.98 |
233 |
|
G6 |
1567.98 |
220 |
|
G#6/ Ab6 |
1661.22 |
208 |
|
A7 |
1760.00 |
196 |
|
A#7/ Bb7 |
1864.66 |
185 |
|
B7 |
1975.53 |
175 |
|
C7 |
2093.00 |
165 |
|
C#7/ Db7 |
2217.46 |
156 |
|
D7 |
2349.32 |
147 |
|
D#7/ Eb7 |
2489.02 |
139 |
|
E7 |
2637.02 |
131 |
|
F7 |
2793.83 |
123 |
|
F#7/ Gb7 |
2959.96 |
117 |
|
G7 |
3135.96 |
110 |
|
G#7/ Ab7 |
3322.44 |
104 |
|
A8 |
3520.00 |
98 |
|
A#8/ Bb8 |
3729.31 |
93 |
|
B8 |
3951.07 |
87 |
|
C8 |
4186.01 |
82 |
|
C#8/ Db8 |
4434.92 |
78 |
|
D8 |
4698.64 |
73 |
|
D#8/ Eb8 |
4978.03 |
69 |
|
Based on A4 being 440Hz and The Speed of sound = 345 m/s (which, in the USA is 1130 ft/s or 770 mph)
It is my pet hate when producers depart from the standard pitch system. They do it on TV when things are over-running, but there really is no need to mess it up when making a pop record — but they do, and it is sloppy work in my opinion.
ears Years ago I used to have a pitch control (speed adjustment knob) on my turntable, and I would make cassette tapes of the corrected music to keep my ears cleansed!
It took me AGES to buy a CD player because I would be unable to pitch correct recordings — until I got a CD player from Richer Sounds complete with a pitch slider control. Result!
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