These classical pieces are public domain so it's completely legal to download the music here. Besides a wide variety of classical music downloads, you'll also find a large selection of free sheet music and free music theory textbooks available at Musopen. Types of Music Available at Musopen.
2. (foll by with) to associate (oneself) or be associated, esp as a subordinate or subsidiary; bring or come into close connection: he affiliated himself with the Union. n. a. a person or organization that is affiliated with another. b. (as modifier): an affiliate member.
affiliation, association, tie, tie-up (noun) a social or business relationship a valuable financial affiliation; he was sorry he had to sever his ties with other members of the team; many close associations with England affiliation (noun) the act of becoming formally connected or joined welcomed the affiliation of the research center with the university