I'm writing a musical theatre piece and I want one of the male character's parts to be sung completely in falsetto, but I have no idea what clef to write it in. Would I write it in treble clef or tenor clef? To my understanding, the range for male falsetto is equivalent to a soprano, right? So if I were to write it in tenor clef it would be very high up on the ledger lines. Would it make more sense to write it in treble clef and write it as I would for a soprano?!
Also: At what note does falsetto usually start? Is it like female head voice, or does it start lower? I'm extremely confused on this since I'm female.