Not Multiverse
Are there multiple universes? If we cannot see them with our eyes are they there?
We cannot see atoms with our eyes, or quarks, or bosons. Are they there?
What is the Multivoice Theory?
How Many Vocal Registers Are There?
It depends on who you talk to.
Some say you have chest voice and head voice.
Some say you have chest voice, middle voice, and head voice.
Some say you have chest voice, low middle voice, high middle voice, head voice, and super head voice.
If you can say all that, you can also say that you have low, middle and high chest voice, and the same for the other vocal registers, but what is to be gained by so may pigeon holes?
Maybe we could give a name to every single semitone on the vocal range, but why?
You have one voice. The most important question is: How is it working for you?