A tuner for a guitar typically uses a lever as a simple machine. More specifically, the tuning pegs on a guitar act as levers. When you turn the tuning peg, it rotates, which adjusts the tension of the strings. This causes the pitch of the strings to change, allowing you to tune the guitar to the desired notes. Another aspect of guitar tuners, especially electronic ones, doesn't involve simple machines in the traditional sense but measures the frequency of the sound to determine how close the pitch is to the desired note.
what type of simple machine is you turn to tune guitar
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