Abstract
An automatic guitar tuning case is a tuning system to automatically, synchronously, accurately and rapidly turn an acoustic guitar or electrical guitar with no requirement of modifying the guitar. It has six optical transducers to respectively detect and convert the vibration of associated six guitar strings to electric signals. A microcontroller unit compares the frequencies of these input signals to selected tones, and then controls six electric tuning wrenches for tuning the six guitar strings. The automatic tuning guitar system also consists of a control panel for a user to preset and select tuning pattern, operate and monitor the system. It only needs to take a few seconds to tune a guitar by this tuning device.
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