usually a piano sheet or something which tells us the keys of the music..
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.
All of them.
The score is printed sheet music that shows all the different instruments' parts at the same time.
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.
The squiggle on a music score indicates a trill, which is a rapid alternation between two notes.
A half rest in music lasts for two beats in a musical score.
A musical score or the process of creating a musical score.
The conductor typically follows a score during a performance.
On a music score it stands for "left hand".
All of them.
The score is printed sheet music that shows all the different instruments' parts at the same time.