An
electric musical instrument is one in which the use of electric devices determines or affects the sound produced by an instrument. Electric musical instruments are an example of
electric music technology. It is also known as an
amplified musical instrument due to the common utilization of an electronic
instrument amplifier to project the intended sound as determined by electric signals from the instrument. Two common types of instrument amplifiers are the
guitar amplifier and the
bass amplifier. This is not the same as an
electronic musical instrument, like a
synthesizer, which uses entirely electronic means to both create and control sound.