| 摘要 |
A method and apparatus including electronic circuitry for tuning a musical instrument. When a tunable vibratory or frequency producing element of the instrument is actuated, the oscillations thereby created are converted into an electrical signal. This signal is operated upon to eliminate harmonic components and is visually displayed on a readout device as a frequency registered in units of cycles per second for a predetermined period of time. If the vibratory element is actuated again within the predetermined period of time, the frequency of the new signal will be displayed, and if the vibratory element is not actuated again within the predetermined period of time, the display on the readout device will register zero.
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