Ferry is an audition of Divine Comedy, and the recording quality of ferry is good, which is suitable for testing the sound quality of the system. It is also possible that "Song Ferry" is a household name, and most people are familiar with the details of the song, which has become an established practice and benchmark. So it became an audition divine comedy. Cai Qin's voice has a wide audio frequency, distinct bass levels and transparent medium and high notes, which is especially suitable for testing the performance of voice. There is a passage in Infernal Affairs. In particular, her audition for The Ferry Man was the best.

Cai Qin's songs.

Cai Qin's songs are not tapes for fans, but tapes sold by the owner of the speaker shop. Customers who really buy HIFI or AV audio will not listen to Cai Qin's music too much. After all, different ages have different musical aesthetics. Fans of the older generation of Cai Qin may be spectators. The reason why the owner of the video store chose Cai Qin as the audition disc of his audio products is also very particular. Generally speaking, it can be divided into three aspects: Cai Qin's musical range, Cai Qin's musical style singing, and Cai Qin's fan effect.