After completing the second major, you will only get a certificate that you have completed the main courses and passed the exam, as well as the transcripts of the main courses, without a degree certificate.
After completing your second degree, you will get your report card and degree certificate. You have to take not only the main courses, but also many other courses, which are similar to those of students in that major.
Double degree for two and a half years, double degree for two years. The music department of this school is not good, there are two books.