Pitching instrument and its implementation method
A technology of audio output and buttons, which is applied in the field of tuner and its realization, can solve problems such as unintuitiveness, auditory errors of music learners, and inapplicability for students' personal practice.
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[0014] Such as figure 1 Shown is the principle block diagram of the application of the present invention, and the present embodiment is a microcomputer tuner for piano, including a single-chip microcomputer (MCU) processing unit, a group of buttons and function switches, audio signal input circuit, crystal oscillator circuit, power supply and reset circuit, liquid crystal display (LCD), power amplifier circuit, audio output circuit and speaker; the single-chip microcomputer is used to run the tuning application program; the tuning application program includes receiving input commands of buttons and switches and performing calculation processing, and the processing results are sent to display The unit displays and outputs audio signals at the same time. The buttons and function switches are connected to the P1 and P2 ports of the microcontroller. There are 12 piano keys set to SW11...SW32. figure 2 As shown, it corresponds to a sound group (one octave) on the piano keyboard, ...
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