Showing posts with label aleatory. Show all posts
Showing posts with label aleatory. Show all posts

Tuesday, 25 September 2012

AudioChem: The Sound of Chemistry

AudioChem is a software instrument that lets you play the sound of the different chemical elements.

I wrote the software back in 2008 as part of my undergraduation dissertation. It takes the emission spectrum (see below) of each element and turns it into a harmony, creating a unique sound. The software was written for Apple Mac and runs on OS X, up to OS 10.6. The download link is below. I'd really appreciate any feedback on the software, as it's still really in beta.

Calcium




DOWNLOAD THE SOFTWARE

AudioChem is a software composition. I call it a composition since it did not assemble itself: it required construction on the basis of aesthetic principles. It is an example of data sonification, taking information about the elements of the Periodic Table as its starting point. In this respect, it is a totally systematic work, and yet both aesthetic choice and aleatory form are intrinsic elements of its construction and final form. It is an example of a Gesamtkunstwerk: a synthesis of different artforms that links general and specific, aesthetic and intellectual, forms of expression to create ‘super-complete thoughts’, denoting actions, things and qualities all at once. It also uses continuous change within the form-rhythm-pitch spectrum, while separating itself into discrete, perceivable objects. In this way, it brought together many of the different areas of thought that preoccupied me at the time.

At the time I wrote AudioChem, I was searching for ways to organise microtonal harmony into cohesive 'tonalities'. There seemed four main approaches possible:
  • The first approach is to use some sort of system, a set of formulae or algorithms. This was the approach used by the Serialists, for example, when tackling the issue of how to create cohesive 12-tone tonalities;
  • The second is more akin to musique concrète. If we view the world as the result of a set of processes or algorithms, the end product will have a certain kind of unity that we then simply record in the field and play back at home;
  • The third could be viewed as either an abstraction from, or an extension of, the second, collecting data from the real world to then turn into audible sound. This data sonification approach is the one I took here;
  • The final one is to use the creative imagination to provide a cohesive unity, for example in improvised performance.
I later somewhat rejected data sonification as a really fruitful avenue of aesthetic investigation, for reasons it would take too long to go into here. However, the results in this piece were intriguing and certainly worthy of note.

In terms of the sound, the data displayed is the emission spectra of the elements: the wavelengths of light emitted by the electrons of each element as they drop to a lower orbit round the nucleus of the atom; these wavelengths are then transposed into audible wavelengths of sound.

Here is an example of the kinds of sounds the programme generates:

Friday, 15 June 2012

Of Sound and Silence

Last week I organised a concert featuring John Cage's 4'33" and Yves Klein's Monotone-Silence Symphony, as well as works by local composers, including myself. The concert was the fourth in Frakture's series of acoustic music nights, Acoute, and took place on 7th June 2012.

In programming the event, I wanted to explore the relationship between Klein and Cage, between sound and silence. Both pieces were written within 3 years of each other. The composers were both interested in Zen Buddhism. Cage's piece was influenced by Rauschenberg's monochrome paintings and Yves Klein is most famous for his blue monochromes.

Klein's original version of the piece had 20 minutes of one continuous sound, followed by 20 minutes of silence. On the night, we presented a 'medley': 4'33" of all one sound, followed by John Cage's silence (apart from a rogue note in the third movement ;) You can watch a video of the performance below.

My piece, Of Sound and Silence, was written in response to Cage and Klein's. In it, I explored the idea of a  single note containing tension, tension that is only released in an explosion of harmony. I also explore 'silence' as a means to create highly textural, or timbral, music. One of the goals I set myself in this piece was a continuation of much of my work for orchestral forces of recent years, the democratisation of musical performance. Using a text score with a conductor, I set out to create highly complex textures and forms that would be impossibly virtuosic for the vast majority of performers.

A few years ago, I started using more aleatory techniques, alongside guided improvisation, in my pieces with this goal in mind. I wanted to create music with complex textures that could be played by musicians from a wide range of playing abilities. After discovering Stockhausen's text scores, I decided to try out the idea. Now musicians didn't even need to be able to read conventional notation, opening up performances to an even wider public.

One of the strengths of aleatory form is also its weakness. It's very easy to create textures that expand, diffuse, grow more complex and polyphonic over time, however the reverse is much more difficult to achieve. One of my aims in Of Sound and Silence was to find mechanisms that could coalesce the music, bring it together in moments of unity. This is something I will explore further in my next piece.

Here is a video of the performance:



The night also featured works by local composers, Richard Harding, Lucia Dunbar, Alex Raimi-Scott. If you go to the Klein & Cage video below, their pieces are also part of the same playlist.

Yves Klein - John Cage medley
Performed by the Novo Ensemble
Conducted by Simon Jones

Tuesday, 7 June 2011

The a.P.A.t.T. Orchestra: Musical Settings Part I

On Sunday I played with the a.P.A.t.T Orchestra in a concert that included work by Cornelius Cardew, Liverpool composer, Richard Harding, and Argentinian composer, Alan Courtis. The concert was the first part of a series of events that will take in various unusual locations in and around Liverpool. This one was at the bandstand in Sefton Park.

The first piece was Alan Courtis' In-Formed Music for newspaper ensemble, which was much as described on the can: creating sounds and textures using newspapers, which had been supplied by the Echo newspaper. More interesting was the next piece, Richard Harding's Untitled, which, while tonal, used aleatoric and improvisational processes to create shifting clouds of sound. Finally came Cardew's piece, Paragraph 7 of The Great Learning. The work is for voices, and with the 23-strong ensemble sounded quite stunning, resounding in power and beauty in equal measure. Using guided improvisation, Cardew's piece starts with dense and dissonant harmonies, slowly evolving into a sparser harmonic field, though still retaining the power of the massed voices.


Here's a short article about the event.

The a.P.A.t.T Orchestra

There are also some photos of the concert taken by Michael Pace-Sigge.