There could well be more than one legitimate answer, so here are a couple. Music paper that composers use to write down the music is called "staff paper". It is just paper with several blank staffs on it. The composer adds everything, including the notes, clefs, time signatures, dynamics, etc.
If the music is already on the paper and is meant to be read by a musician, singer, conductor, etc. it is called "sheet music". Interestingly, only recently has sheet music transferred over into the digital age. Now sheet music can be read from digital music stands.
Music paper is typically called sheet music. Sheet music can have music notes and lyrics for any type of instrument.
Manuscript... According to my last music class.
Music in sheet form.
It is called the music desk.
score
the staff
jokul
Gro
A composer.
It is called a score or sheet music.
This is generally called a jukebox musical.
There really is no technical name for someone who impersonates musical instruments and machines. They would simply be called an impersonator of musical instruments and machines.
A numbered musical piece might be called a concerto, an opus, or a composition. It could also be called a symphony.
It is called a 'score'
It is called a 'score'
It is called a 'score'
A composer.
It is called a score or sheet music.
score
score
score
It is called an autograph.
amanuensis
Manuscript
Mona Mender has written: 'Music manuscript preparation' -- subject(s): Musical notation