The design of musical instrument tuning system based on stm32f103 microcomputer

With the development of people´s living standard, musical instruments have soon spread to thousands of households with wide range of sounds, beautiful melodies and strong auditory complex feelings. Because of the physical characteristics of instrument string, it needs periodic calibration. As a result, the demand of the instrument tuning work is increasing rapidly. At present, instrument tuning workers judge instrument note pitch relying on professional´s hearing and experience, then adjust strings manually. As a typical representative of musical instrument, the piano is deployed in this work. This paper is proposed a detection method of piano single pitch with stm32f103 microcomputer, which regulates piano key frequencies by measuring with the characteristics of convenience, accuracy and easy promotion.