17 12ths – Just Intonation Interval Music

August 27th, 2014

DSCF1130crop

17 12ths is a piece inspired by Scott Thompson’s addition of Just Intonation intervals to the xenwiki. The music you hear uses the interval of 17/12 as plucked strings in Kontakt 5 with adaptive “pure” tuning with a harmonic 7th turned on. I improvised and then added reverb in post production. Each key played is an interval of 17/12 and when using multiple keys complex harmonies build up quickly though Kontakt tries its best to interpet and at times you can hear a pitch drift when I add a note to a ringing chord.

The xenwiki says the following about this interval:

In 17-limit Just Intonation, 17/12 is the “second septendecimal tritone,” measuring very nearly 603¢. Its inversion is the “first septendecimal tritone,” 24/17, and the interval that separates them is the small comma 299/298, about 6¢. This difference is usually negligible, and tempering out this comma allows the 600¢ half-octave to function as both septendecimal tritones. Thus, every even-numbered EDO system contains a close approximation to these intervals.

17/12 is the mediant between the two septimal tritones 7/5 and 10/7.

Diablack (Fokker Block tuning)

August 27th, 2014

DSCF1186crop

Diablack is an unedited piano improvisation in Gene Ward Smith’s tuning “diablack”.

! diablack.scl
Unique 256/245&2048/2025 Fokker block
10
!
16/15
9/8
6/5
81/64
64/45
3/2
8/5
27/16
9/5
2/1

dans l’esprit de Nighthawks (diachrome4)

August 25th, 2014
Nighthawks by Edward Hopper, 1942

Nighthawks by Edward Hopper, 1942

dans l’esprit de Nighthawks is a piano solo improvised and then slightly edited to remove glitch notes and rendered at the original tempo. This is my first attempt at playing something in Gene Ward Smith’s diachrome 4 tuning (below). So far the diachrome series has been a smoky, blues / jazz mixture. Finely crafted tunings with definite attitude and plenty of expressive freedom.

Nighthawks is one of my favorite 20th century paintings and one I’ve seen in person at the Art Institute of Chicago – a very worthy destination for inspiration.

! diachrome4.scl
Fourth 25/24&2048/2025 scale = inverse diachrome5
10
!
16/15
75/64
5/4
4/3
64/45
3/2
5/3
16/9
15/8
2/1

Dumpster Diving Blues (solo piano in Diachrome5 Tuning)

August 23rd, 2014

6460025a
photo credit Carol Rice

Dumpster Diving Blues is a one take improvisation in Gene Ward Smith’s Fokker 10 based diachrome5 tuning (see below). I was intrigued by the fact this didn’t have a 3/2 fifth in the root position of the tuning. After playing the opening two chord exchange I decided to try a bit of blues. I think the tuning certainly seems quite soulful and reminded me of dark Chicago alleys in a frosty fall night.

Gene’s tuning in scala format

! diachrome5.scl
Fifth 25/24&2048/2025 scale = pipedum_10b inverse diachrome4
10
!
10/9
75/64
5/4
4/3
64/45
25/16
5/3
16/9
15/8
2/1

Straight From the Box

August 23rd, 2014

016a

Straight From the Box is a piece built around the provided lyrics of Evan Harrington. It was performed in 1986 on a Casio CZ-101 using two cassette decks and a 4 mono channel mixer. (see schematic below). With this method you simply had to live with what happened in the past, so a lot of practice took place to get to even this amount of finish on the production which could be loads better. On the other hand it did force a certain amount of discipline in the form of practice and ingenuity to circumvent or hide what you know you couldn’t perform better. There was a way to “tune” the cassette decks by adjusting the motor speed so that one could transfer a cassette from one deck to the other to avoid a layer of tape noise which built up quickly. Considering really good brands of cassette decks can be found at Goodwill it is possible to do this for very little money. I have been told, but never tried, that VHS tape has even high fidelity for this method. Again, those can be found for very little money at second hand shops.

cassette deck A => L/R ==> cassette deck B
new performance => L/R =^

A word about the lyrics. Evan Harrington was one of my very best friends and provided me with much material for setting to music. Evan has passed on and is greatly missed. He was and still is a constant inspiration.

Everywhere You Are (Fokker 10 – JI – Blackchrome1)

August 17th, 2014

P1080311a

Everywhere You Are is a piano solo using the Blackchrome1 tuning created by Gene Ward Smith (below)

blackchrome1 created by Gene Ward Smith
! blackchrome1.scl
First 25/24&256/245 scale = Dwarf(<10 16 23|) = efg33335
! x^10-17*x^8-16*x^7+78*x^6+132*x^5-29*x^4-168*x^3-100*x^2-16*x
10
!
16/15
9/8
6/5
4/3
27/20
3/2
8/5
27/16
9/5
2/1

Igstruded 15 edo guitar, drums, piano collaboration

August 17th, 2014

P1080506a

Igstruded is a collaboration of Igliashon Jones and myself in 15 edo – Igs composed the guitar and drums to go along with my “Extruded” 15 edo piano.

Politicians Stand Upon the Blood of Gaza (24 edo)

August 16th, 2014

DestrAlDaluHouse

Politicians Stand Upon the Blood of Gaza is a composition for synthesizers and percussion in 24 edo.

Sinjar Mountians for choir, bowed gamelan, bowed electric piano and percussion in 7 edo

August 15th, 2014

Sinjar_Mountains


Sinjar Mountians
for choir, bowed gamelan, bowed electric piano and percussion in 7 edo

Extruded (15 edo piano)

August 12th, 2014

Extrusion

Extruded is a solo piano piece with the intention of being the core / basis of an internet collaborative effort in 15 edo. Feel free to join in. I’d like to hear what you come up with!