Professor Tseng Yung-yi of National Taiwan University's (NTU) Department of Chinese says that the differing melodies of different regions let a listener know which kind of opera is actually being performed.
台大中文系教授曾永義說，出於不同地方的聲腔，往往是最後一道防線，讓人知道演出的到底是什麼劇種。