Probably not such a lover of music, who would not hear works for violin, called long and unusual: Introduction and Rondo capriccioso. The author was a French composer Saint-saëns. Remember, it starts pretty slow, free ringtone, and after a short introductory section should be quick, whimsical, whimsical music.
C.saint-Saens. Introduction and Rondo capriccioso
Performs L. Kogan
About what the words mean Rondo and Capriccio, you can read stories devoted to them. Well, the Latin word introductio means the entry. In the musical works of the so-called introductory episode, for the most part slow, anticipating the entry of the main musical themes.
There are introductions in front of the Opera action, part of a cantata or oratorio. And Mikhail Ivanovich Glinka was called introductions opening scene of his Opera "Ivan Susanin and Ruslan and Lyudmila", the scene in which has not yet begun action, and gives a sort of Preface - wide, large strokes written pattern to the events that will unfold in the future.
M. I. Glinka. Chorus "my Motherland" (introduction) from the Opera "Ivan Susanin"