musical codes
If you are referring to an orchestra as a whole, you still call it an orchestra.
Another term for conductor is Maestro.
The music
Anyone can get the music score of Tchaikovsky's Swan Lake from any decent music shop. Foyle's Bookshop in London, for example, or Chappell's music shop also in London, would be likely to stock the music score of Swan Lake. You go to the music floor, search for composers alphabetically, look for Tchaikovsky, and there should be the score for the Swan Lake ballet. There may be two different scores - a full orchestral score or a "piano" score (a shortened score). Or you may search the Internet, which may give you many sites from which you could order the score.
The conductor typically follows a score during a performance.
The term for the process of moving from one key to another in music is called modulation.
Another term for writing music is composition. I don't know of any others.
If you are referring to an orchestra as a whole, you still call it an orchestra.
Another word for 20 years is "score." This term is often used in historical or literary contexts, such as in the phrase "four score and seven years ago."
Another term for conductor is Maestro.
Score is a written musical composition; parts for different instruments appear on separate staves on large pages it can also be the mark out of 10 you get for performing but whenever you come across it, it will be a written musical composition form,
The libretto is the text - the lyrics - which the composer adds music to. The score is the music on which the libretto is sung.
The music
International Music Score Library Project was created in 2006.
Creating an orchestra music score involves composing the music, arranging the parts for different instruments, and notating the music on sheet music. The composer writes the music, the arranger adapts it for different instruments, and the score is then written out for each instrument in the orchestra to play.
Anyone can get the music score of Tchaikovsky's Swan Lake from any decent music shop. Foyle's Bookshop in London, for example, or Chappell's music shop also in London, would be likely to stock the music score of Swan Lake. You go to the music floor, search for composers alphabetically, look for Tchaikovsky, and there should be the score for the Swan Lake ballet. There may be two different scores - a full orchestral score or a "piano" score (a shortened score). Or you may search the Internet, which may give you many sites from which you could order the score.
Rubato is another term for tempo fluctuations in music, indicating a flexible interpretation by the performer.