Tuning Reference for Sound Synthesis

Overview

This page provides frequency tables for note lists. Pitch names follow the linear music code: a pound/hash sign (#) indicates a sharp while an exclamation point (!) indicates a flat.

The relevant unit of measurement for tunings is the cent.

Equal-Tempered Tuning

In equal-tempered tunings, the ratio between two consecutive degrees of the chromatic scale is everywhere

2(1/12) = 1.0594…
CD!DE!EFF#/G!GA!AB!B
Cents010020030040050060070080090010001100

Table 1-1: Equal-Tempered Tuning.

The equal-tempered perfect fifth of 700 cents is 2 cents narrower than the ratio 3:2. The equal-tempered major third of 400 cents is 14 cents wider than the ratio 5:4.

OctaveCC#DE!EFF#GA!AB!B
016.3517.3218.3519.4520.6021.8323.1224.5025.9627.5029.1430.87
132.7034.6536.7138.8941.2043.6546.2549.0051.915558.2761.74
265.4169.3073.4277.7882.4187.3192.5098.00103.8110116.5123.5
3130.8138.6146.8155.6164.8174.6185.0196.0207.7220233.1246.9
4261.6277.2293.7311.1329.6349.2370.0392.0415.3440466.2493.9
5523.3554.4587.3622.3659.3698.5740.0784.0830.6880932.3987.8
6104711091175124513191397148015681661176018651976
7209322172349248926372794296031363322352037293951
8418644354699497852745588592062726645704074597902
983728870939799561054811175118401254413290140801491715804

Table 1-1: Frequencies for equal-tempered tuning based on A4 = 440 Hz.

Pythagorean Tuning

According to the Wikipedia entry on Meantone Temperament, Pythagorean tuning generates “all non-octave intervals” from a “stack of perfect fifths”. Each of these fifths is tuned in an exact ratio of 3:2, or 702 cents. Table 2-1 details which ratios go with which pitch names.

CD!DE!EFF#G!GA!AB!B
Ratios1:1256:2439:832:2781:644:3729:5121024:7293:2128:8127:1616:9243:128
Cents0902049964084986125887027929069961110

Table 2-1: Ratios for Pythagorean tuning.

Notice that each successive ratio in the sequence C, G, D, A, E, B, F# adds a factor of 3 to the numerator; the denominator always being a power of 2. Similarly, each successive ratio in the sequence D, F, B!, E!, A!, D! G! adds a factor of 3 to the denominator; in these cases the numerators are always powers of 2. Notice also that F# and G! have different ratios. F# is sharper than G! by 23 cents.

The Pythagorean major third from C to E is 408 cents, which is 21 cents wider than the ratio 5:4.

OctaveCD!DE!EFF#G!GA!AB!B
016.3517.2218.3919.3820.6921.8023.2822.9724.5325.8427.5929.0731.04
132.7034.4536.7938.7641.3943.6046.5645.9349.0551.6755.1858.1362.08
265.4068.9073.5877.5182.7787.2093.1291.8798.10103.3110.4116.3124.2
3130.8137.8147.2155.0165.5174.4186.2183.7196.2206.7220.7232.5248.3
4261.6275.6294.3310.0331.1348.8372.5367.5392.4413.4441.5465.1496.6
5523.2551.2588.6620.1662.2697.6744.9734.9784.8826.8882.9930.1993.3
61046110211771240132413951490147015701654176618601987
72093220523542480264927902980294031393307353237213973
84186441047094961529755815960587962786614706374417946
98371881994189921105951116211919117591255713229141261488215892

Table 2-2: Frequencies for Pythagorean tuning based on C4 = 261.6 Hz.

Meantone Temperament

According to Wikipedia, Meantone Temperament generates “generates all non-octave intervals from a stack of tempered perfect fifths” (italics mine). Meantone temperament has many flavors. These include equal temperament, where a perfect fifth has 700 cents, and Pythagorean tuning, where a perfect fifth has 702 cents. However the temperament most commonly referred to as “meantone” is the “quarter-comma” flavor, where a perfect fifth has 697 cents (5 cents narrow than the ratio 3:2).

CD!DE!EFF#G!GA!AB!B
Cents011519430938850368761869781289110061190

Table 3-1: Quarter-comma meantone tuning.

The quarter-comma meantone major third from C to E is 388 cents, which is only 2 cents wider than the ratio 5:4.

OctaveCD!DE!EFF#G!GA!AB!B
016.3517.4718.2919.5420.4621.8622.8823.3624.4526.1327.3529.2330.60
132.7034.9536.5839.0940.9143.7245.7746.7348.9152.2754.7158.4761.20
265.4069.8973.1678.1881.8387.4591.5393.4697.82104.5109.4116.9122.4
3130.8139.8146.3156.4163.7174.9183.1186.9195.6209.1218.8233.9244.8
4261.6279.6292.6312.7327.3349.8366.1373.8391.3418.2437.7467.7489.6
5523.2559.1585.2625.4654.6699.6732.3747.6782.6836.3875.4935.5979.1
61046111811701251130913991465149515651673175118711958
72093223723412502261927982929299131303345350137423917
84186447346825003523755975858598162606690700374847833
983718946936410007104741119411716119621252113381140061496815666

Table 3-2: Frequencies for “quarter-comma meantone” tuning based on C4 = 261.6 Hz.

Just-Intonation — 5-Limit

According to Wikipedia, Just Intonation includes “any musical tuning in which the frequencies of notes are related by ratios of small whole numbers”.

CD!DE!EFF#G!GA!AB!B
Ratios1:116:159:86:55:44:345:3264:453:28:55:39:515:8
Cents011220431638649859061070281488410181088

Table 3-1: Ratios for 5-Limit tuning.

The just “5-limit” tuning presented here comes from the same Wikipedia entry. It assigns ratios to pitch names as detailed in Table 4-1.

OctaveCD!DE!EFF#G!GA!AB!B
016.3517.4418.3919.6220.4421.8022.9923.2524.5326.1627.2529.4330.66
132.7034.8836.7939.2440.8843.6045.9846.5149.0552.3254.5058.8661.31
265.4069.7673.5878.4881.7587.2091.9793.0198.10104.6109.0117.7122.6
3130.8139.5147.2157.0163.5174.4183.9186.0196.2209.3218.0235.4245.3
4261.6279.0294.3313.9327348.8367.9372.1392.4418.6436.0470.9490.5
5523.2558.1588.6627.8654697.6735.8744.1784.8837.1872.0941.8981.0
61046111611771256130813951472148815701674174418841962
72093223223542511261627902943297631393348348837673924
84186446547095023523255815886595362786697697675347848
983718929941810045104641116211772119061255713394139521506815696

Table 4-2: Frequencies for just “5-limit” tuning based on C4 = 261.6 Hz.

Just-Intonation — Overtone Tuning

According to Wikipedia, Just Intonation includes “any musical tuning in which the frequencies of notes are related by ratios of small whole numbers”.

CD!DE!EFF#GA!AB!B
Ratio1:117:169:819:165:421:1611:83:225:1613:87:415:8
Cents01052042983864715517027738419691088

Table 5-1: Ratios for overtone tuning.

This just tuning assigns ratios to pitch names as detailed in Table 5-1. These ratios come exclusively the overtone series; hence the denominator of each ratio is a power of 2.

OctaveCD!DE!EFF#GA!AB!B
016.3517.3718.3919.4220.4421.4622.4824.5325.5526.5728.6130.66
132.7034.7436.7938.8340.8842.9244.9649.0551.0953.1457.2361.31
265.4069.4973.5877.6681.7585.8489.9398.10102.2106.3114.5122.6
3130.8139.0147.2155.3163.5171.7179.9196.2204.4212.6228.9245.3
4261.6278.0294.3310.7327343.4359.7392.4408.8425.1457.8490.5
5523.2555.9588.6621.3654686.7719.4784.8817.5850.2915.6981.0
6104611121177124313081373143915701635170018311962
7209322242354248526162747287831393270340136623924
8418644474709497052325494575562786540680273257848
983718894941899411046410987115101255713080136031465015696

Table 5: Frequencies for just overtone tuning based on C4 = 261.6 Hz.

Just-Intonation — 7-11

According to Wikipedia, Just Intonation includes “any musical tuning in which the frequencies of notes are related by ratios of small whole numbers”.

PitchCD!DD#E!EFF#G!GG#AB!!B!B
Ratio1:112:118:77:614:1121:164:311:816:113:232:2111:712:77:411:6
Cents01512312674184714985516497027297829339691049

Table 5-1: Ratios for 7-11 tuning.

I made up the just 7-11 tuning for the Note-List Instructions. I have no idea if anyone else has used it before and took no trouble to research the issue. My initial idea was to create a tuning with open consonances (ratios involving 3) and semi-consonances (ratios involving 7), but no soft consonances (ratios involving 5). Since this initial prescription produced only 9 ratios, I added in several ratios involving 11. The selected ratios are detailed in Table 6-1.

OctaveCD!DD#E!EFF#G!GG#AB!!B!B
016.3517.8418.6919.0820.8121.4621.8022.4823.7824.5324.9125.6928.0328.6129.98
132.7035.6737.3738.1541.6242.9243.6044.9647.5649.0549.8351.3956.0657.2359.95
265.4071.3574.7476.3083.2485.8487.2089.9395.1398.1099.66102.8112.1114.5119.9
3130.8142.7149.5152.6166.5171.7174.4179.9190.3196.2199.3205.5224.2228.9239.8
4261.6285.4299.0305.2332.9343.4348.8359.7380.5392.4398.6411.1448.5457.8479.6
5523.2570.8597.9610.4665.9686.7697.6719.4761.0784.8797.3822.2896.9915.6959.2
6104611421196122113321373139514391522157015951644179418311918
7209322832392244226642747279028783044313931893289358836623837
8418645664784488353275494558157556088627863786577717573257674
983719132956797661065410987111621151012176125571275613155143511465015347

Table 6-2: Frequencies for just 7-11 tuning based on C4 = 261.6 Hz.

© Charles Ames Page created: 2013-02-20 Last updated: 2017-08-15