The electromagnetic pickup can be single coil or hum, which can convert the vibration of the steel string into an electrical signal, and then feed the signal to the amplifier through a cable or radio transmitter. Steel strings and their electric amplification function make cheap electric guitars to percuss, pull and hammer (also known as "sluur"), pinch harmonics, increase volume, and use vibrato arms or effect pedals, which are common among many modern performers popular.
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