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Tuesday, December 21, 2010

James Tenney: Music for Player Piano



James Tenney created this piece in 1964. It is stochastic music. Maybe a bit of explanation will help. I will try to keep it simple. Take a musical piece like a process evolving from its first sound to the last one. Each sound represents an event in the evolution from start to end. In a deterministic world, each new sound of the melody is determined by the precedent sounds according to some rules (like the rules of harmony).

In real life, however, the events do not always follow a rule. A new event is not just the consequence of past; there is room for chance. Think a chess and think at backgammon. Believers would say that it's fate. Agnostics would rather say that it's hazard.

Well, stochastic music tries to follow the way of real life. The following sound will come somehow on its own: backgammon rather than chess. For this the composer has to use the computer, to generate randomness.

It sounds weird to emulate nature by using a computer. Here is the thing: the computer does not determine the following sound; it is just doing a probabilistic research and indicates some results. The computer is just a tool helping the composer.

The techniques of computer generated music are diverse: law of large numbers, probability theory, game theory, Boolean algebra, Markovian chain, Poisson law, group theory... okay, you've got the picture. Jim Tenney was a pioneer in the field of computer generated music.

I dedicate this post to Silvia Median, a colleague of mine from the IT R&D Institute in Bucharest, where I have worked till 2002. Silvia Median (who had studied Mathematics at the Bucharest University, with Prof. Moisil) was very interested in the field of computer-generated music.




(James Tenney)

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James Tenney: For Ann (rising)



Composed by Jim Tenney in 1969 For Ann (rising) is a piece of electronic music that creates the sensation of a continuous ascending sound. It is a deceptive sensation (the way in which Escher created the visual impression of continuous stairs in his Ascending and Descending).



Tenney got this by using a superposition of sine waves, each one starting in infrasonic and ending in ultrasonic - each wave takes over the precedent one. The concept is known as the Shepard scale (more precise the Shepard-Risset glissando). It was used also by Ligeti in L'Escalier du Diable.

The following video gives a graphical explanation of the Shepard scale.



(James Tenney)

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Monday, December 20, 2010

James Tenney: Chromatic Canon

Jim Tenney, circa 1980
(photo Ann Holloway)

Jim Tenney dedicated the Chromatic Canon to Steve Reich, who observed that this piece had put him in bed with Arnold Schoenberg. Reich was right: the Chromatic Canon is a wizardry that fuses Minimalism and Dodecaphony. A repeated incantation using all twelve notes. The Marriage of Heaven with Hell, as William Blake would have said.







(James Tenney)

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James Tenney: Spectral Canon for Conlon Nancarrow

(photo by Paula Court)

Tenney composed the Spectral Canon in 1972. It is a piece for player-piano. Nancarrow punched the piano role for it. It would be impossible to be performed by a human: maybe by more musicians on more pianos.

I found the Spectral Canon on youTube right now and it's amazing. It uses 24 notes of a harmonic sequence and variates the duration of each sound. The timing is logarithmically determined by the position of the note in the sequence. Says Dok in Doklands, his daily musical blog, Tenney seems to be testing the limits of piano construction.




(James Tenney)

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James Tenney: Collage #1 (Blue Suede)


James Tenney was the composer and music theorist who awoke my interest for Musica Nova. It was through him that I discovered Nancarrow, Ives, and the other masters of modern music. A truly seminal artist!

By the time I started my passion for the music of Tenney there was only one CD available on Amazon: Selected Works, 1961-1969. These were early compositions. I bought it and after listening the eight pieces, I wrote my impressions here on the blog.

Meanwhile other CDs were released and lovers of his music started to publish videos with his works on youTube.

Here is the first piece from that CD that I bought: Collage #1 (Blue Suede). It is a tape collage of a one of Presley's recordings, with Blue Suede Shoes rock.

The work of Tenney consists of four variations on Blue Suede. Here is what I wrote about it in 2007:

Tenney created the variations on the rock by using the techniques of tape music - he took the tape record and processed it by speed changes, reversal, head echo, filtering, and the like. There are four variations: the first is worked on the drums, omitting voice; the second introduces some higher pitched timbres in dialog with the sounds from the first section, and you begin to recognize the original score; the third section has the voice much clearer; the last variation takes the voice in contrapuntal relationship with the other sounds. It is deconstruction and reconstruction from samples.The rockability is kept - however Tenney takes care to shock us now and then with unexpected rhythm breaks.




(James Tenney)

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Sunday, August 26, 2007

A few words about James Tenney

James TenneyI listened several times the CD with music by James Tenney and I ordered a book written by him about Gestalt Music. Probably after reading it I will know something more about this stuff. What I know so far is that Tenney has a theory about sounds, he used the term of clang, to designate a sound with all his characteristics (like pitch or volume), also he studied the influence of determined or random variations on these characteristics over music quality.

I listened meanwhile excerpts from Conlon Nancarrow, Charles Ives and Erik Satie. Satie is probably a more familiar name. Anyway, his music seems to me more accessible. As he had lived long before the others, the public had enough time to understand his compositions.

Interim, the first movie of Brakhage, is scored by Tenney. The movie was made in 52. Brakhage was nineteen, Tenney was eighteen. I watched it again yesterday. It seemed to me that the music was in the style of Erik Satie's Gymnopedies.

Another movie by Brakhage scored by Tenney is Desistfilm, made sometime in 53 or 54. Here music is much more difficult, alike to later compositions of Tenney.

The CD has pieces composed in the sixties. Tenney studied at the University of Illinois; the reason he had gone there was that they had all kind of devices for experimental music. He started there to compose music on the computer and became active in music algorithm development.

The CD starts with a tape collage of Blue Suede Shoes (the rock that was composed by Carl Perkins and was performed also by Presley). So Tenney created the variations on the rock by using the techniques of tape music - he took the tape record and processed it by speed changes, reversal, head echo, filtering, and the like. There are four variations: the first is worked on the drums, omitting voice; the second introduces some higher pitched timbres in dialog with the sounds from the first section, and you begin to recognize the original score; the third section has the voice much clearer; the last variation takes the voice in contrapuntal relationship with the other sounds. It is deconstruction and reconstruction from samples.

The rockability is kept - however Tenney takes care to shock us now and then with unexpected rhythm breaks.

I enjoyed mostly the second piece from the CD, Noise Study - it renders the noise of wind on a beach. No musical sound at all, only noise. It’s superb.

Actually Tenney rendered the noise made by cars in a tunnel – only for me it’s more like wind.

The next piece on the CD is named Dialogue - and it is actually a dialog between noise bands and pure tones. Tenney had a theory of equivalence; actually this was for him the most general principle in modern music: all sounds are equivalent; it means there are no musical sounds and non-musical sounds, just sounds, and any sound can potentially be in a musical structure. Dialogue is actually an attempt to follow this principle of equivalence: tones and noise were in dialog, as pairs.

The piece that follows, Phases, dedicated to Edgar Varèse is really difficult; it needs several auditions to become a bit accessible. After some auditions I would say that it has the delicacy of the music of Erik Satie (only it operates with totally different sounds, of course). It makes no concession to the public: it is Tenney himself.

A piece for player-piano is very interesting. A player-piano has a perforated tape reader (or a magnetic reader, or computer interface); the reader commands a pneumatic or electric mechanism to activate the keys – the music is on the tape (or on the computer). Basically the player-piano could execute scores that would claim a high degree of virtuosity from a pianist. Conlon Nancarrow was the great composer for player-piano – I’m waiting for one of his CDs.

A performer could play interactively on a player-piano – kind of jam session – that performer is a pianolist.

But let’s come back to Tenney‘s CD – Ergodos II is dedicated to John Cage; it’s very much like the Phases for Edgar Varèse. Ergodic is the term Tenney coined to designate the modern music. He was persuaded by the idea that other terms were emphasizing what the modern music was not that what it was: atonal music, interesting experiment, etc.

Then come Fabric for Che and For Anne (Rising) – both sound as the score is continuously ascending; it seems that the illusion of perpetual glissando is made by using for each sequence infra and ultra frequencies at the beginning and end.

I’ll come back on this stuff.


(By Brakhage)


(Musica Nova)

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