Falsetto refers to a tone produced without the vibration of the full vocal cords. It is a disconnected sound, usually very breathy. It’s used mainly by rock singers, crooners and poor vocalists. Personally, I don’t like the sound. Those chazzanim who sing in the bel canto style don’t use it. Rather they use the head register (kop shtime) to produce a very reedy sound, but one that still has vibratto and is connected to the other vocal registers.
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