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.
A composer.
It is called a score or sheet music.
A musical manuscript that serves as a blueprint for a musical piece is called a "score." This written representation includes the notes, rhythms, dynamics, and instrumentation necessary for performers to interpret and execute the work. Scores can vary in complexity, encompassing everything from simple lead sheets to elaborate orchestral scores.
A musical manuscript, also known as a score, serves as the blueprint for a musical piece, containing the written notation that guides musicians in performance. It includes essential elements such as melody, harmony, rhythm, dynamics, and instructions for interpretation. Scores can vary in complexity, from simple melodies to intricate orchestral arrangements, and are crucial for preserving and communicating the composer’s intentions.
This is generally called a jukebox musical.
It is called a 'score'
It is called a 'score'
A composer.
It is called a 'score'
It is called a score or sheet music.
score
score
score
It is called an autograph.
Manuscript
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Mona Mender has written: 'Music manuscript preparation' -- subject(s): Musical notation