ACappella is a style of music that can be sung solo or in a group but purposely consists of no instruments.
The Acappella originated in the first century and grew population in the IX, X and XI Centuries. tThe name is an Homage to Pope Gregory...
The Acappella has grown gradually in popularity in the past few years. It has become a very popular genre of music now a days....
Acappella music was used a lot in religious music, especially in church music; As well as Zemirot and Anasheed.
Christian Origins: The polyphony of Christian a cappella music began to develop in Europe around the late 15th century AD. Early versions of a cappella music may have used single instruments, but this was changed later on.
Bizantine Right: In the Bazynitine Right eastern orthodox church and the Eastern Catholic Churches, the music performed is exclusively sung without any group help. I could not find a reason as to why this is, but yeah. This basically means that there is no one to add back singing or any second help, they sing with only one person.