The guitar, Fig. 26.1, was the first instrument to make popular use of electronics. Electric guitars use a suitable pickup to transduce the motion of the guitar strings to electrical signals. These signals may be amplified and fed into one or more loudspeakers, and usually provision is made to modify the character of sound in several ways. The tone may be modified so that a guitar of a given form and size, with a fixed tone capability without electronics, can be made to sound like many instruments in the guitar family through the use of electronics. In addition, either vibrato or tremolo can be added to tones electronically, and a variety of novelty effects, such as “fuzz tone” can be produced.

A typical United States patent describes ...

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