Research On String Electronic Tuner And Its Acoustic Signal Processing Technology

Music has become an important part of the people's growing needs for a b etter life,and stringed instruments play an important role.Stringed instruments are generally sounded by a number of different thickness strings.When the stringed instrument is used or idle for a period of time,the vibration frequency of some strings w ill deviate from the frequency specified by the rhythm,and the frequency ratio between the strings and the strings will also deviate from the rhythm requirements,resulting in The pitch of the entire stringed instrument is out of alignment;the music play ed with the instrument with misaligned tones will be detuned(out of tune),seriously affecting the performance.Therefore,stringed instruments should be tuned every once in a while.The school sound is a more complicated professional work.Therefore,bef ore the 21 st century,it is generally necessary to ask professional lawyers to adjust the piano,violin,harp,guqin,guzheng and other stringed instruments.21 st century Since then,the number of stringed instruments has been increasing,and the number of lawyers has been extremely slow.The number of professional lawyers has become increasingly disproportionate with the number of stringed instruments.It has become the most popular and effective means to compensate for the shortage of professional tutors through the use of Tuner-assisted tuning.With the increasing popularity of mobile communications and smart phones,the research and development of electronic tuner based on smart phone software has become a new development trend.There are already some el ectronic tuner that can be used for a variety of different tonal instruments,which can show the pitch of the instrument,especially for beginners who lack knowledge of the instrument.This paper makes an in-depth discussion on the key acoustic information technology realized by the stringed instrument electronic tuner.In the first part of this paper,the relevant research status of stringed instrument electronic tuner at home and abroad;in the second part,focus on the basic music theory and acoustic kno wledge of stringed instruments and the basic principles,key technologies and basic steps of string instrument tuning;In the third part,the algorithm principle of the pitch detection time domain algorithm in the acoustic signal processing of the string i nstrument tuner is described in detail,and the experimental analysis and suggestions are given.In the fourth part,the algorithm of the non-time domain algorithm of pitch detection is described in detail.The principle also carries out corresponding expe riments to analyze the performance of the algorithm.Finally,the development of stringed instrument electronic tuner is expected.