Quantitative analysis of choir sound integration and practical application of harmonic theory

Chorus is a polyphonic vocal art. Sound fusion and harmony are an important basis for measuring the quality of the chorus. How to train many chorus members into fusion, harmony and unity of acoustics is the unremitting pursuit of chorus conductors and chorus members. In this paper, after studying the physical properties of sound and the physiological mechanism of its generation, we use the spectrum analysis method based on acoustic theory to quantify the sound fusion of the choir and introduce the base-2FFT algorithm extracted by time to improve the spectrum analysis method, so as to achieve the audio signal identification and noise reduction of the sound fusion. The analysis of the mixed chorus “The Good Place of the Wujin Sand Sea” shows that the chorus members sang by using the method of head voice straight voice, which can do their best to eliminate each person’s singing individuality and timbral characteristics, and integrate the individual timbre into the collective, and sang with a smooth breath, with the amplitude in the range of [-40,40]. In contrast, the choristers sang using the solo state method, the choristers retained their personalities in their singing, did not integrate their colours into the collective, and the sound between the voices was not sufficiently balanced in their singing, with amplitude values between [-80,80]. The use of spectral visualisation allows conductors to control musical elements more accurately in the professional practice of rehearsing choral works.