Abstract:

More and more, new systems have been developed aiming at providing solutions for any sort of problems. When the subject is music, this is not different. Nowadays, computer programs are frequently used by musicians to assist them in tasks as automatic creation of scores and music composition. In this context, new techniques have been searched to analyse and to process sounds in an efficient way. This work presents a methodology to verify if a musical instrument is in tune. The statistical method of autocorrelation is used to identify the fundamental frequency and consequently the pitch of the sound. Due to some problems presented later, in some cases the relation between frequency and pitch is not completely true. To avoid this problem, special modules were developed, so that specific features of each instrument and the human sensibility could be considered and a better result could be achieved.