They would be called a soloist.
A "solo".
A soloist.
a Duettt :)
Two people singing together is known as a Duet.
scat singing? if that's what you mean
Solo.
The person who leads the prayers is called a 'cantor'.
they have the same singing voice it is one person.
one person singing by him/her self
A soloist can describe one singing. It can also describe a person performing music without singing. One person singing may be a base of an audience, money, a recording, autograph signing, advertisement, an award, and more. To a number of people it may indicate there's no bird there, or maybe a disturbance to a number which maybe is a thing which may be good is not occurring. One person singing my be a world conversion onto a throne of peace. A solo singer may be a solo vocalist, diva, and/or chanteuse, or more.
Singing in Harmony means when a group of people sing a song and take turns singing parts of it instead of just one person singing the verses
i think sining started when some person started humming and some one started singing