Musicians like Mozart usually worked in the courts of the nobles as musicians or the court composers.
The backing band on the record would have been session musicians hired by the day ,so would be impossible to know who played trumpet on any particular track when they were laid down.There were(and are) many talented musicians who earn there living in this way but are never identifiable
Amateurs do not earn money off music.
A successful living
Gregg Allman's dad was in the Army to earn a living to support his family.
He's a blues guitarist and has performed in some clubs like BB KIngs.
By performing "gigs" (concerts, programs, etc). Some musicians are part of a popular touring group - they earn their living from many many hours of work performing. Other musicians earn a living as a church musician, which offers steady work every week.
He didn't earn living
So that musicians could earn a living and the patrons who frequented the spots where they played could have a good time.
how do people in belarus earn living
I think they earn there living such as traders.
they could sell art, or other goods, or they could die.
To ensure they are paid for the work they do mainly and help neighbours and community during offs.
People in Scotland earn a living by working.
People earn a living by raising money from working
Humans need to earn a living for survival.
how did most colonists earn a living in jersey
Most musicians earn their living by selling their music. Some do occasionally give some of their music away for free. There are sites such as Jamendo (See links below) which distribute free music that the musicians are happy to share but commercial music that is distributed freely from websites will be being illegally distributed.