History
Not classified as a "preparation", but more as an extended technique is the slide guitar technique. With prepared guitars, however, one of the key goals in preparing the instrument is changing its timbre – the fundamental tone composition of the sound. This is typically achieved by placing objects on or under the strings. The objects can have a tone of their own, like for instance a pencil spring, but can also cause strange string resonance effects or behave like a seesaw and create echoing or buzzing effects after being struck and swinging like a balance. Many of the sounds sound more or less like clocks, bells or Non Western musical instruments or even non string percussion instruments.
Read more about this topic: Prepared Guitar
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“... the history of the race, from infancy through its stages of barbarism, heathenism, civilization, and Christianity, is a process of suffering, as the lower principles of humanity are gradually subjected to the higher.”
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“What is most interesting and valuable in it, however, is not the materials for the history of Pontiac, or Braddock, or the Northwest, which it furnishes; not the annals of the country, but the natural facts, or perennials, which are ever without date. When out of history the truth shall be extracted, it will have shed its dates like withered leaves.”
—Henry David Thoreau (1817–1862)
“The history of medicine is the history of the unusual.”
—Robert M. Fresco, and Jack Arnold. Prof. Gerald Deemer (Leo G. Carroll)