Music or not?

Thanks to a friend who gave me this gadget with some songs preloaded.

I heard that it's good to play songs/music that the patient is familiar with.  Even though dad most probably doesn't know any SOP songs, I work with what I've got and played 注目看耶穌 today for him.  I translated the chorus for him in Cantonese in between musical phrases.

注目看耶穌，定睛看耶穌，聖潔公義主，十架上耶穌，
注目看耶穌，定睛看耶穌，謙卑親近主，跟著祂同步。

By the end of the song, dad's heart rate increased by almost 20 pulse/min. Was it too loud? Did something go wrong? Or did he get excited?  Time to go and let him rest.