Let me answer the question...
If it is a person interview...you can choose a song that is related to the person's background. If there is no special song that can match it. Then you can use pure music...piano music...violin music...songs with medium to slow speed...
Then people listening/watching the program will feel very comfortable, and the interviewees can also relax ..
Recommended album: Piano Love Song\Feng Chao Records: Three Cat Cookies\...
I said it all myself