Complex sentence: Archetypal "enka" singers employ a silliler style of vibrato known as "kobushi", in which the pitch of the singer's voice fluctuates within one scale degree.
Split into simpler sentences: Archetypal "enka" singers employ a silliler style of vibrato known as "kobushi". However, the true "kobushi" technic is that the pitch of the singer's voice fluctuates within one scale degree.