Method for identifying playing actions and playing frets of stringed instrument

A method for identifying a playing action and a playing fret of a stringed instrument comprising a body, a multi-channel string signal acquisition device and a signal processing device arranged on the body, wherein, the body comprises a nut and a string erected on the nut;

• the multi-channel string signal acquisition device is arranged below the string and close to the nut, and each channel of the multi-channel string signal acquisition device is provided with a strong magnetic magnetic magnet;
• the multi-channel string signal acquisition device comprises an analog signal acquisition module, and the signal processing device comprises a signal amplification module, a multi-channel analog-to-digital conversion module, an operation module and a communication module;
• the method comprises the following steps:
• acquiring, by the analog signal acquisition module, an electrical signal generated by cutting the magnetic lines of the strong magnetic magnet when a string vibrates and outputting an analog signal;
• outputting a DC signal by the signal amplification module after filtering, amplifying and biasing the analog signal;
• sampling the DC signal by the multi-channel analog-to-digital conversion module and converting DC signal into a digital signal;
• performing an operation on the digital signal by the operation module, and outputting a detection result;
• and
• sending the detection result to a terminal by the communication module.