this is vibrato innit
OK e vibrato - non e ?
a thousand usual suspects start moaning and some even warbling in vibrato - as they see it ( pun intended). One even protests - "we have banned the word 'cantata' ( group singing) - "a cappella goes to 'organist goes to have a well-earned cuppa'". "we cant use motet - I learned last week that was Latin!" - someone else says a cappella is just one cappellum innit - to wild usuall suspect approval
Singing styles have varied over the centuries - oo-er Mrs - and in hand written scores, from olden days, there was a musical sign for when the composer allowed the soprano to let rip
The da capo aria is a musical form for arias that was prevalent in the Baroque era. It is sung by a soloist with the accompaniment of instruments, ... ( now called improvisation)
By about 1800 - there was much "more come on come on - sing what I have written damn you!" = some improvisations were so good the composers transcribed them and told the arteests they had to do them as well ! - Arteests bazoomz heaved and noses put out of joint
saying they will learn by the themselves is like saying they can teach themselves the piano or French pronunciation or teaching yourself to drive ....