A concert is a live performance, usually of music, before an audience. The music may be performed by a single musician, sometimes then called a recital, or by a musical ensemble, such as an orchestra, a choir, or a musical band.
"For me, the most important thing is the element of chance that is built into a live performance. The very great drawback of recorded sound is the fact that it is always the same. No matter how wonderful a recording is, I know that I couldn't live with it -- even of my own music -- with the same nuances forever." - Aaron Copland, Classic Essays on Twentieth-Century Music, ISBN 0028645812.
"I can't believe that people really prefer to go to the concert hall under intellectually trying, socially trying, physically trying conditions, unable to repeat something they have missed, when they can sit at home under the most comfortable and stimulating circumstances and hear it as they want to hear it. I can't imagine what would happen to literature today if one were obliged to congregate in an unpleasant hall and read novels projected on a screen." - Milton Babbitt, Classic Essays on Twentieth-Century Music
"The Prokofiev 'Romeo and Juliet' sends an entire audience ompomming into the street, invisible swords flickering." - Pam Brown