# Sycamore family

The head of the sycamore family is 5-limit sycamore, which tempers out (25/24)^6/(5/4) = |-16 -6 11> = 48828125/47775744. The dual of the monzo is the wedgie, <<11 6 -16||, which tells us that six chromatic semitone generators give 5/4 (and hence five 6/5) and eleven give 3/2. 94edo supports sycamore, and 5\94 is reommendable as a generator. It can be described as the 19&94 temperament, and uses a decidedly flat version of the chromatic semitone as a generator. MOS of 18 or 19 notes to the octave give enough room for sycamore's triads, but 37 notes can be tried by the adventurous.

Another possible tuning uses a generator which is a pure 3/2 divided into 11 parts, and this makes the generator chain of sycamore exactly the same as Carlos Beta. In fact, Carlos Beta is characterized by Carlos as taking five steps to reach 6/5 and six to reach 5/4, which means it tempers out the sycamore comma. It can be described as the generator chain of sycamore, or sycamore can be called Carlos Beta with octaves.

## Contents

# Sycamore

Comma: 48828125/47775744

POTE generator: ~25/24 = 63.779

Map: [<1 1 2|, <0 11 6|]

EDOs: 18, 19, 56, 75, 94, 207c, 301c

Badness: 0.2100

## 7-limit

The second element of the normal comma list for septimal sycamore is 875/864, the keema, and it also tempers out 686/675, the senga, and 3136/3125, hemimean. It has <<11 6 15 -16 -7 18|| for a wedgie, and may also be called the 19&56 temperament. This may also be used as the name for the temperament obtained by adding 100/99 to sycamore's commas, giving unidecimal sycamore, where 10 generator steps reaches 16/11, 11 reach 3/2, and 15 give 7/4, adding a considerable dose of 11-limit harmonies to the 19-note MOS. 75edo is an excellent tuning for 7-limit sycamore, and 56edo for the 11-limit version.

Commas: 686/675, 875/864

POTE generator: ~25/24 = 63.995

Map: [<1 1 2 2|, <0 11 6 15|]

EDOs: 18, 19, 56, 75d

Badness: 0.0620

## 11-limit

Commas: 100/99, 385/384, 686/675

POTE generator: ~25/24 = 64.268

Map: [<1 1 2 2 4|, <0 11 6 15 -10|]

Badness: 0.0559

## 13-limit

Commas: 91/90, 100/99, 169/168, 385/384

POTE generator: ~25/24 = 64.296

Map: [<1 1 2 2 4 3|, <0 11 6 15 -10 13|]

EDOs: 18, 19, 37, 56

Badness: 0.0343

# Betic

Septimal sycamore sharpens the fifth from where it stands in the 5-limit, and lowers accuracy in order to reach 7-limit harmonies. If we retain tunings approximately (eg 94et) or exactly those of Carlos Beta, we get the 19&94 temperament, betic, for the 7-limit. This adds 225/224 to the sycamore comma, and has <<11 6 34 -16 23 62|| as a wedgie. The Carlos Beta tuning, with pure fifths, is a good tuning choice, but 94 or 113 equal are as well. Betic extends to the 11-limit upon addition of 385/384 or 540/539 to the list of commas, which means it supports both 7 and 11-limit marvel. The wedgie starts <<11 6 34 -29 ...||.

Commas: 225/224, 1071875/1062882

POTE generator: 63.701

Map: [<1 1 2 1|, <0 11 6 34|]

EDOs: 19, 75, 94, 113, 133, 320c, 433cd

11-limit

Commas: 225/224, 385/384, 218750/216513

POTE generator: 63.776

Map: [<1 1 2 1 5|, <0 11 6 34 -29|]

EDOs: 19, 75, 94, 207c