Intervals of BP: Difference between revisions
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This page lists the first 42 intervals of the [[Bohlen–Pierce]] scale in both its [[just intonation]] (JI) version and its [[Equal-step tuning|equal-tempered]] (ET) version, [[13edt]]. | |||
This | |||
In the "nearby JI intervals, octave-reduced" columns, the intervals from the original just BP scale are in bold. Errors are sorted by ascending absolute value. | |||
{| class="wikitable" | |||
|- | |||
! rowspan="2" | Degree | |||
! colspan="2" | Just intonation | |||
! colspan="2" | Equal-tempered | |||
! colspan="3" | Nearby JI intervals, [[Octave reduction|octave-reduced]] | |||
|- | |||
! Ratio | |||
! [[Cent]]s | |||
! [[Hekt]]s | |||
! Cents | |||
! Ratio | |||
! Cents | |||
! Error in 13edt (¢) | |||
|- | |||
| 0 | |||
| 1/1 | |||
| 0 | |||
| 0 | |||
| 0 | |||
| 1/1 | |||
| 0 | |||
| 0 | |||
|- | |||
| 1 | |||
| 27/25 | |||
| 133.238 | |||
| 100 | |||
| 146.304 | |||
| 12/11<br />13/12<br />'''27/25''' | |||
| 150.6<br />138.6<br />'''133.2''' | |||
| −4.3<br />+7.7<br />'''+13.1''' | |||
|- | |||
| 2 | |||
| 25/21 | |||
| 301.847 | |||
| 200 | |||
| 292.608 | |||
| 32/27<br />13/11<br />19/16<br />'''25/21''' | |||
| 294.1<br />289.2<br />297.5<br />'''301.8''' | |||
| −1.5<br />+3.4<br />−4.9<br />'''−9.2''' | |||
|- | |||
| 3 | |||
| 9/7 | |||
| 435.084 | |||
| 300 | |||
| 438.913 | |||
| '''9/7''' | |||
| '''435.1''' | |||
| '''+3.8''' | |||
|- | |||
| 4 | |||
| 7/5 | |||
| 582.512 | |||
| 400 | |||
| 585.217 | |||
| '''7/5'''<br />45/32 | |||
| '''582.5'''<br />590.2 | |||
| '''+2.7'''<br />−5.0 | |||
|- | |||
| 5 | |||
| 75/49 | |||
| 736.931 | |||
| 500 | |||
| 731.521 | |||
| 32/21<br />26/17<br />'''75/49'''<br />49/32<br />20/13 | |||
| 729.2<br />735.6<br />'''736.9'''<br />737.7<br />745.8 | |||
| +2.3<br />−4.1<br />'''−5.4'''<br />−6.2<br />−14.3 | |||
|- | |||
| 6 | |||
| 5/3 | |||
| 884.359 | |||
| 600 | |||
| 877.825 | |||
| '''5/3''' | |||
| '''884.4''' | |||
| '''−6.5''' | |||
|- | |||
| 7 | |||
| 9/5 | |||
| 1017.596 | |||
| 700 | |||
| 1024.130 | |||
| 38/21<br />29/16<br />'''9/5'''<br />20/11 | |||
| 1026.7<br />1029.6<br />'''1017.6'''<br />1035.0 | |||
| −2.6<br />−5.5<br />'''+6.5'''<br />−10.9 | |||
|- | |||
| 8 | |||
| 49/25 | |||
| 1165.024 | |||
| 800 | |||
| 1170.434 | |||
| '''49/25''' | |||
| '''1165.0''' | |||
| '''+5.4''' | |||
|- | |||
| 9 | |||
| 15/7 | |||
| 1319.443 | |||
| 900 | |||
| 1316.738 | |||
| '''15/14'''<br />16/15<br />14/13 | |||
| '''119.4'''<br />111.7<br />128.3 | |||
| '''−2.7'''<br />+5.0<br />−11.6 | |||
|- | |||
| 10 | |||
| 7/3 | |||
| 1466.871 | |||
| 1000 | |||
| 1463.042 | |||
| '''7/6'''<br />22/19 | |||
| '''266.9'''<br />253.8 | |||
| '''−3.8'''<br />+9.2 | |||
|- | |||
| 11 | |||
| 63/25 | |||
| 1600.108 | |||
| 1100 | |||
| 1609.347 | |||
| 19/15<br />81/64<br />24/19<br />14/11<br />'''63/50''' | |||
| 409.2<br />407.8<br />404.4<br />417.5<br />'''400.1''' | |||
| +0.1<br />+1.5<br />+4.9<br />−8.2<br />'''+9.2''' | |||
|- | |||
| 12 | |||
| 25/9 | |||
| 1768.717 | |||
| 1200 | |||
| 1755.651 | |||
| 11/8<br />18/13<br />26/19<br />'''25/18''' | |||
| 551.3<br />563.4<br />543.0<br />'''568.7''' | |||
| +4.4<br />−7.7<br />+12.7<br />'''−13.1''' | |||
|- | |||
| 13 | |||
| 3/1 | |||
| 1901.955 | |||
| 1300 | |||
| 1901.955 | |||
| '''3/2''' | |||
| '''702.0''' | |||
| '''0''' | |||
|- | |||
| 14 | |||
| 81/25 | |||
| 2035.193 | |||
| 1400 | |||
| 2048.259 | |||
| 18/11<br />13/8<br />'''81/50''' | |||
| 852.6<br />840.5<br />'''835.2''' | |||
| −4.3<br />+7.8<br />'''+13.1''' | |||
|- | |||
| 15 | |||
| 25/7 | |||
| 2203.802 | |||
| 1500 | |||
| 2194.563 | |||
| 16/9<br />'''25/14''' | |||
| 996.1<br />'''1003.8''' | |||
| −1.5<br />'''−9.2''' | |||
|- | |||
| 16 | |||
| 27/7 | |||
| 2337.039 | |||
| 1600 | |||
| 2340.868 | |||
| '''27/14''' | |||
| '''1137.0''' | |||
| '''+3.8''' | |||
|- | |||
| 17 | |||
| 21/5 | |||
| 2484.467 | |||
| 1700 | |||
| 2487.172 | |||
| 20/19<br />'''21/20'''<br />19/18<br />22/21 | |||
| 88.8<br />'''84.5'''<br />93.6<br />80.5 | |||
| −1.6<br />'''+2.7'''<br />−6.4<br />+6.7 | |||
|- | |||
| 18 | |||
| 225/49 | |||
| 2638.886 | |||
| 1800 | |||
| 2633.476 | |||
| 8/7<br />'''225/196'''<br />15/13 | |||
| 231.2<br />'''238.9'''<br />247.7 | |||
| +2.3<br />'''−5.4'''<br />−14.2 | |||
|- | |||
| 19 | |||
| 5/1 | |||
| 2786.314 | |||
| 1900 | |||
| 2779.780 | |||
| '''5/4'''<br />26/21 | |||
| '''386.3'''<br />369.7 | |||
| '''−6.5'''<br />+10.1 | |||
|- | |||
| 20 | |||
| 27/5 | |||
| 2919.551 | |||
| 2000 | |||
| 2926.085 | |||
| 19/14<br />'''27/20'''<br />15/11 | |||
| 528.7<br />'''519.6'''<br />537.0 | |||
| −2.6<br />'''+6.5'''<br />−10.9 | |||
|- | |||
| 21 | |||
| 147/25 | |||
| 3066.979 | |||
| 2100 | |||
| 3072.389 | |||
| 28/19<br />25/17<br />'''147/100'''<br />22/15 | |||
| 671.3<br />667.7<br />'''667.0'''<br />663.0 | |||
| +1.1<br />+4.7<br />'''+5.4'''<br />+9.4 | |||
|- | |||
| 22 | |||
| 45/7 | |||
| 3221.398 | |||
| 2200 | |||
| 3218.693 | |||
| '''45/28'''<br />8/5<br />21/13 | |||
| '''821.4'''<br />813.7<br />830.3 | |||
| '''−2.7'''<br />+5.0<br />−11.6 | |||
|- | |||
| 23 | |||
| 7/1 | |||
| 3368.826 | |||
| 2300 | |||
| 3364.997 | |||
| '''7/4'''<br />26/15 | |||
| '''968.8'''<br />952.3 | |||
| '''−3.8'''<br />+12.7 | |||
|- | |||
| 24 | |||
| 189/25 | |||
| 3502.063 | |||
| 2400 | |||
| 3511.302 | |||
| 19/10<br />40/21<br />36/19<br />21/11<br />'''189/100''' | |||
| 1111.2<br />1115.5<br />1106.4<br />1119.5<br />'''1102.1''' | |||
| +0.1<br />−4.2<br />+4.9<br />−8.2<br />'''+9.2''' | |||
|- | |||
| 25 | |||
| 25/3 | |||
| 3670.672 | |||
| 2500 | |||
| 3657.606 | |||
| 33/32<br />'''25/24''' | |||
| 53.3<br />'''70.7''' | |||
| +4.3<br />'''−13.1''' | |||
|- | |||
| 26 | |||
| 9/1 | |||
| 3803.910 | |||
| 2600 | |||
| 3803.910 | |||
| '''9/8''' | |||
| '''203.9''' | |||
| '''0''' | |||
|- | |||
| 27 | |||
| 243/25 | |||
| 3937.148 | |||
| 2700 | |||
| 3950.214 | |||
| 11/9<br />27/22<br />'''243/200''' | |||
| 347.4<br />354.5<br />337.1 | |||
| +2.8<br />−4.3<br />'''+13.1''' | |||
|- | |||
| 28 | |||
| 75/7 | |||
| 4105.757 | |||
| 2800 | |||
| 4096.518 | |||
| 4/3<br />'''75/56''' | |||
| 498.0<br />'''505.8''' | |||
| −1.5<br />'''−9.2''' | |||
|- | |||
| 29 | |||
| 81/7 | |||
| 4238.994 | |||
| 2900 | |||
| 4242.823 | |||
| '''81/56'''<br />36/25 | |||
| '''639.0'''<br />631.3 | |||
| '''+3.8'''<br />+11.5 | |||
|- | |||
| 30 | |||
| 63/5 | |||
| 4386.422 | |||
| 3000 | |||
| 4389.127 | |||
| 30/19<br />'''63/40'''<br />128/81<br />19/12<br />11/7<br />100/63 | |||
| 790.8<br />'''786.4'''<br />792.2<br />795.6<br />782.5<br />799.9. | |||
| −1.7<br />'''2.7'''<br />−3.1<br />−6.5<br />+6.6<br />−10.8 | |||
|- | |||
| 31 | |||
| 675/49 | |||
| 4540.841 | |||
| 3100 | |||
| 4535.431 | |||
| 12/7<br />'''675/392'''<br />19/11 | |||
| 933.1<br />'''940.8'''<br />946.2 | |||
| +2.3<br />'''−5.4'''<br />+10.8 | |||
|- | |||
| 32 | |||
| 15/1 | |||
| 4688.269 | |||
| 3200 | |||
| 4681.735 | |||
| 28/15<br />'''15/8'''<br />13/7 | |||
| 1080.6<br />'''1088.3'''<br />1071.7 | |||
| +1.1<br />'''−6.5'''<br />+10.0 | |||
|- | |||
| 33 | |||
| 81/5 | |||
| 4821.506 | |||
| 3300 | |||
| 4828.040 | |||
| 64/63<br />'''81/80''' | |||
| 27.3<br />'''21.5''' | |||
| +0.7<br />'''+6.5''' | |||
|- | |||
| 34 | |||
| 441/25 | |||
| 4968.934 | |||
| 3400 | |||
| 4974.344 | |||
| 21/19<br />'''441/400'''<br />10/9<br />11/10 | |||
| 173.3<br />'''168.9'''<br />182.4<br />165.0 | |||
| +1.0<br />'''+5.4'''<br />−8.1<br />+9.3 | |||
|- | |||
| 35 | |||
| 135/7 | |||
| 5123.353 | |||
| 3500 | |||
| 5120.648 | |||
| '''135/112'''<br />6/5 | |||
| '''323.4'''<br />315.6 | |||
| '''−2.7'''<br />+5.0 | |||
|- | |||
| 36 | |||
| 21/1 | |||
| 5270.781 | |||
| 3600 | |||
| 5266.952 | |||
| 17/13<br />'''21/16'''<br />98/75<br />64/49<br />13/10 | |||
| 464.4<br />'''470.8'''<br />463.1<br />462.3<br />454.2<br /> | |||
| +2.5<br />'''−3.8'''<br />+3.9<br />+4.6<br />+12.7 | |||
|- | |||
| 37 | |||
| 567/25 | |||
| 5404.018 | |||
| 3700 | |||
| 5413.257 | |||
| 64/45<br />10/7<br />567/400 | |||
| 609.8<br />617.5<br />'''604.0''' | |||
| +3.5<br />−4.2<br />'''+9.2''' | |||
|- | |||
| 38 | |||
| 25/1 | |||
| 5572.627 | |||
| 3800 | |||
| 5559.561 | |||
| 14/9<br />'''25/16''' | |||
| 764.9<br />'''772.6''' | |||
| −5.3<br />'''−13.1''' | |||
|- | |||
| 39 | |||
| 27/1 | |||
| 5705.865 | |||
| 3900 | |||
| 5705.865 | |||
| '''27/16''' | |||
| '''905.9''' | |||
| '''0''' | |||
|- | |||
| 40 | |||
| 729/25 | |||
| 5839.103 | |||
| 4000 | |||
| 5852.169 | |||
| 11/6<br />'''729/400''' | |||
| 1049.4<br />'''1039.1''' | |||
| +2.8<br />'''+13.1''' | |||
|- | |||
| 41 | |||
| 225/7 | |||
| 6007.712 | |||
| 4100 | |||
| 5998.473 | |||
| 1/1<br />'''225/224''' | |||
| 0.0<br />'''7.7''' | |||
| −1.5<br />'''+9.2''' | |||
|} | |||
[[Category:Bohlen–Pierce]] | |||
[[Category:Lists of intervals]] | |||
[[Category:Tables]] | |||
Latest revision as of 15:44, 31 July 2025
This page lists the first 42 intervals of the Bohlen–Pierce scale in both its just intonation (JI) version and its equal-tempered (ET) version, 13edt.
In the "nearby JI intervals, octave-reduced" columns, the intervals from the original just BP scale are in bold. Errors are sorted by ascending absolute value.
Degree | Just intonation | Equal-tempered | Nearby JI intervals, octave-reduced | ||||
---|---|---|---|---|---|---|---|
Ratio | Cents | Hekts | Cents | Ratio | Cents | Error in 13edt (¢) | |
0 | 1/1 | 0 | 0 | 0 | 1/1 | 0 | 0 |
1 | 27/25 | 133.238 | 100 | 146.304 | 12/11 13/12 27/25 |
150.6 138.6 133.2 |
−4.3 +7.7 +13.1 |
2 | 25/21 | 301.847 | 200 | 292.608 | 32/27 13/11 19/16 25/21 |
294.1 289.2 297.5 301.8 |
−1.5 +3.4 −4.9 −9.2 |
3 | 9/7 | 435.084 | 300 | 438.913 | 9/7 | 435.1 | +3.8 |
4 | 7/5 | 582.512 | 400 | 585.217 | 7/5 45/32 |
582.5 590.2 |
+2.7 −5.0 |
5 | 75/49 | 736.931 | 500 | 731.521 | 32/21 26/17 75/49 49/32 20/13 |
729.2 735.6 736.9 737.7 745.8 |
+2.3 −4.1 −5.4 −6.2 −14.3 |
6 | 5/3 | 884.359 | 600 | 877.825 | 5/3 | 884.4 | −6.5 |
7 | 9/5 | 1017.596 | 700 | 1024.130 | 38/21 29/16 9/5 20/11 |
1026.7 1029.6 1017.6 1035.0 |
−2.6 −5.5 +6.5 −10.9 |
8 | 49/25 | 1165.024 | 800 | 1170.434 | 49/25 | 1165.0 | +5.4 |
9 | 15/7 | 1319.443 | 900 | 1316.738 | 15/14 16/15 14/13 |
119.4 111.7 128.3 |
−2.7 +5.0 −11.6 |
10 | 7/3 | 1466.871 | 1000 | 1463.042 | 7/6 22/19 |
266.9 253.8 |
−3.8 +9.2 |
11 | 63/25 | 1600.108 | 1100 | 1609.347 | 19/15 81/64 24/19 14/11 63/50 |
409.2 407.8 404.4 417.5 400.1 |
+0.1 +1.5 +4.9 −8.2 +9.2 |
12 | 25/9 | 1768.717 | 1200 | 1755.651 | 11/8 18/13 26/19 25/18 |
551.3 563.4 543.0 568.7 |
+4.4 −7.7 +12.7 −13.1 |
13 | 3/1 | 1901.955 | 1300 | 1901.955 | 3/2 | 702.0 | 0 |
14 | 81/25 | 2035.193 | 1400 | 2048.259 | 18/11 13/8 81/50 |
852.6 840.5 835.2 |
−4.3 +7.8 +13.1 |
15 | 25/7 | 2203.802 | 1500 | 2194.563 | 16/9 25/14 |
996.1 1003.8 |
−1.5 −9.2 |
16 | 27/7 | 2337.039 | 1600 | 2340.868 | 27/14 | 1137.0 | +3.8 |
17 | 21/5 | 2484.467 | 1700 | 2487.172 | 20/19 21/20 19/18 22/21 |
88.8 84.5 93.6 80.5 |
−1.6 +2.7 −6.4 +6.7 |
18 | 225/49 | 2638.886 | 1800 | 2633.476 | 8/7 225/196 15/13 |
231.2 238.9 247.7 |
+2.3 −5.4 −14.2 |
19 | 5/1 | 2786.314 | 1900 | 2779.780 | 5/4 26/21 |
386.3 369.7 |
−6.5 +10.1 |
20 | 27/5 | 2919.551 | 2000 | 2926.085 | 19/14 27/20 15/11 |
528.7 519.6 537.0 |
−2.6 +6.5 −10.9 |
21 | 147/25 | 3066.979 | 2100 | 3072.389 | 28/19 25/17 147/100 22/15 |
671.3 667.7 667.0 663.0 |
+1.1 +4.7 +5.4 +9.4 |
22 | 45/7 | 3221.398 | 2200 | 3218.693 | 45/28 8/5 21/13 |
821.4 813.7 830.3 |
−2.7 +5.0 −11.6 |
23 | 7/1 | 3368.826 | 2300 | 3364.997 | 7/4 26/15 |
968.8 952.3 |
−3.8 +12.7 |
24 | 189/25 | 3502.063 | 2400 | 3511.302 | 19/10 40/21 36/19 21/11 189/100 |
1111.2 1115.5 1106.4 1119.5 1102.1 |
+0.1 −4.2 +4.9 −8.2 +9.2 |
25 | 25/3 | 3670.672 | 2500 | 3657.606 | 33/32 25/24 |
53.3 70.7 |
+4.3 −13.1 |
26 | 9/1 | 3803.910 | 2600 | 3803.910 | 9/8 | 203.9 | 0 |
27 | 243/25 | 3937.148 | 2700 | 3950.214 | 11/9 27/22 243/200 |
347.4 354.5 337.1 |
+2.8 −4.3 +13.1 |
28 | 75/7 | 4105.757 | 2800 | 4096.518 | 4/3 75/56 |
498.0 505.8 |
−1.5 −9.2 |
29 | 81/7 | 4238.994 | 2900 | 4242.823 | 81/56 36/25 |
639.0 631.3 |
+3.8 +11.5 |
30 | 63/5 | 4386.422 | 3000 | 4389.127 | 30/19 63/40 128/81 19/12 11/7 100/63 |
790.8 786.4 792.2 795.6 782.5 799.9. |
−1.7 2.7 −3.1 −6.5 +6.6 −10.8 |
31 | 675/49 | 4540.841 | 3100 | 4535.431 | 12/7 675/392 19/11 |
933.1 940.8 946.2 |
+2.3 −5.4 +10.8 |
32 | 15/1 | 4688.269 | 3200 | 4681.735 | 28/15 15/8 13/7 |
1080.6 1088.3 1071.7 |
+1.1 −6.5 +10.0 |
33 | 81/5 | 4821.506 | 3300 | 4828.040 | 64/63 81/80 |
27.3 21.5 |
+0.7 +6.5 |
34 | 441/25 | 4968.934 | 3400 | 4974.344 | 21/19 441/400 10/9 11/10 |
173.3 168.9 182.4 165.0 |
+1.0 +5.4 −8.1 +9.3 |
35 | 135/7 | 5123.353 | 3500 | 5120.648 | 135/112 6/5 |
323.4 315.6 |
−2.7 +5.0 |
36 | 21/1 | 5270.781 | 3600 | 5266.952 | 17/13 21/16 98/75 64/49 13/10 |
464.4 470.8 463.1 462.3 454.2 |
+2.5 −3.8 +3.9 +4.6 +12.7 |
37 | 567/25 | 5404.018 | 3700 | 5413.257 | 64/45 10/7 567/400 |
609.8 617.5 604.0 |
+3.5 −4.2 +9.2 |
38 | 25/1 | 5572.627 | 3800 | 5559.561 | 14/9 25/16 |
764.9 772.6 |
−5.3 −13.1 |
39 | 27/1 | 5705.865 | 3900 | 5705.865 | 27/16 | 905.9 | 0 |
40 | 729/25 | 5839.103 | 4000 | 5852.169 | 11/6 729/400 |
1049.4 1039.1 |
+2.8 +13.1 |
41 | 225/7 | 6007.712 | 4100 | 5998.473 | 1/1 225/224 |
0.0 7.7 |
−1.5 +9.2 |