Sonogram Visible Speech:Version 3.0 (Build 4248) Released (April 2010)

Open Source, Cross Platform Software for Waveform, Spectrum, Spectogram/Sonogram, LPC-Spectrum, LPC-Prediction-Error, Autocorrelation, Cepstrum, and Wavelet-Transformation analysis.

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John Cage


John Milton Cage Jr. (September 5, 1912 – August 12, 1992) was an American composer, philosopher, poet, music theorist, artist, printmaker, and amateur mycologist and mushroom collector. A pioneer of chance music, electronic music and non-standard use of musical instruments, Cage was one of the leading figures of the post-war avant-garde. Critics have lauded him as one of the most influential American composers of the 20th century. He was also instrumental in the development of modern dance, mostly through his association with choreographer Merce Cunningham, who was also Cage’s romantic partner for most of their lives.

Cage is perhaps best known for his 1952 composition 4′33″, the three movements of which are performed without a single note being played. The content of the composition is meant to be perceived as the sounds of the environment that the listeners hear while it is performed, rather than merely as four minutes and thirty three seconds of silence, and the piece became one of the most controversial compositions of the twentieth century. Another famous creation of Cage’s is the prepared piano (a piano with its sound altered by placing various objects in the strings), for which he wrote numerous dance-related works and a few concert pieces, the best known of which is Sonatas and Interludes (1946–48).

His teachers included Henry Cowell (1933) and Arnold Schoenberg (1933–35), both known for their radical innovations in music and coincidentally their shared love of mushrooms, but Cage’s major influences lay in various Eastern cultures. Through his studies of Indian philosophy and Zen Buddhism in the late 1940s, Cage came to the idea of chance-controlled music, which he started composing in 1951. The I Ching, an ancient Chinese classic text on changing events, became Cage’s standard composition tool for the rest of his life. In a 1957 lecture, Experimental Music, he described music as “a purposeless play” which is “an affirmation of life – not an attempt to bring order out of chaos nor to suggest improvements in creation, but simply a way of waking up to the very life we’re living”.


Fontana Mix was composed in 1958 at the Studio do Fonologia in Milan where John Cage was working on a piece for four tape recorders. The composition is unusually notated – the score consists of sheets and transparencies with printed points, squares, curves and lines that are to be freely overlayed upon one another. The constellations that result from this chance procedure are applied to musical parameters to create a possible realization of the piece.

This isn’t an ‘opus’ in the classical sense, rather it is a ‘construction kit’ for non-intentional production of music, which allows the creation of different pieces: along with Fontana Mix for tape, John Cage composed Aria for mezzo soprano (1958), Water Walk (1959), Theater Piece for 1-8 performers (1960), and Cornelius Cardew used it for the realization of his Solo for Guitar.

In Fontana Mix Cage developed his concept of indeterminacy that he continued to use in countless variations throughout his life. As a composer, he separated himself from his work, so that the work’s existence was not dependent on subjective compositional decisions, but rather on the objective instance – chance. The aim of this non-intentionality is the freeing of sounds, to let them exist on their own, instead of being used to express emotion or meaning. Associated with this is the rejection of any expression.

Cage did not intend that the application of chance was a license for free choice. As an artist concerned with ‘structural thinking’, Cage invented ingenious composition systems in which precisely defined sound material was organized ‘non-intentionally’ based on his systems of rules. For Fontana Mix and Variations he developed a graphic chance generator, afterwards he used the Chinese oracle book I-Ging, and from the 1980’s on, he used a computer program developed by Andrew Culver. It’s no wonder that Cage integrated the computer into his production process. It freed him from the time consuming and tedious labour of communicating chance values but still lead to the wished-for result: sounds, free of intentional arrangement.

Press Here To Download A Copy Of Fontana Mixer 1.1 By Karlheintz Essl (Mac only)

Oldest Know Recording Of Computer Music (With Audio}


The Ferranti Mark 1, also known as the Manchester Electronic Computer in its sales literature,[1] and thus sometimes called the Manchester Ferranti, was the world’s first commercially available general-purpose electronic computer.  Included in the Ferranti Mark 1’s instruction set was a hoot command, which enabled the machine to give auditory feedback to its operators. The sound generated could be altered in pitch, a feature which was exploited when the Mark 1 made the earliest known recording of computer music, playing a medley which included “God Save the King“, “Baa Baa Black Sheep“, and “In the Mood”. The recording was made by the BBC towards the end of 1951, and the programming was done by Christopher Strachey, a maths teacher at Harrow and a friend of Alan Turing. It was not however the first computer to have played music – CSIRAC, Australia’s first digital computer, achieved that with a rendition of Colonel Bogey.

The IBM 7090-The First Computer To Sing-1961


The IBM 7090 was a second-generation transistorized version of the earlier IBM 709 vacuum tube mainframe computers and was designed for “large-scale scientific and technological applications”. The 7090 was the third member of the IBM 700/7000 series scientific computers. The first 7090 installation was in November 1959. In 1960, a typical system sold for $2,900,000 or could be rented for $63,500 a month.

The 7090 used a 36-bit word length, with an address-space of 32K (32,768) words. It operated with a basic memory cycle of 2.18 μs, using the IBM 7302 Core Storage core memory technology from the IBM 7030 (Stretch) project.

Daisy Bell 1895 Version

IBM 7090 Version