The key in the development of Western music is the same that marks it up until this point- the rise in technology.

Historically, the rise in manufacturing and technology has allowed composers to expand their creative pallets as musical instrument invention and production allowed for a wide tonal range for composers. But, in the twentieth century, technology as a whole was a key mover in the development in how music was made, and heard. Here is a selected time-line of events that helps to define the development of twentieth century music:

Recorded Sound. The flat record is invented by Emile Berliner in 1888.

Notation of the blues by W.C Handy. This music was folk music in the truest sense, and up until W.C Handy's work in notating it, it was an aural tradition full of mystery. Even today, the roots of the blues can only be guessed at, but it has become infused in the creation of all kinds of musical genres.

The predominant use of the saxophone for live music. The invention of the saxophone in 1841 by Adolph Sax, had a delayed effect on the music of the 20th century. As bands in nightclubs became more the norm in the 1920s, an instrument was needed to be loud enough to be heard over the sound and stamping, dancing feet. The raspy honk of the sax was perfect!

The Rise of Radio. Invented earlier in the century, Radio was becoming more and more popular, beaming across the airwaves and delivering music from all walks of life to listeners who may not have otherwise heard it. Early musical radio stars such as the Carter Family now had a platform to consolidate both a sound and an audience for what is now known as country music. Blues artists would also make an impact later on, their sounds beamed into the homes of an otherwise segregated white audience. Elvis Presley, among others, would benefit from the fact that airwaves don't discriminate.

The Invention of the microphone. Before the microphone, singers were often forced to shout their songs in order to be heard. With the microphone, singers like Bing Crosby were able to "croon" instead, letting the technology do the work. This not only had a technological impact on the listener, but also allowed a singer to explore expression and nuance to a performance

The Invention of the Electric Guitar and Amplifier. Another Adolphe, this time Adolphe Rickenbacher, invented the electric guitar, allowing the same function that the saxophone served to an even greater degree. This invention

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