§ 107 · Limitations on exclusive rights: Fair useł8Notwithstanding the provisions of sections 106 and 106A, the fair use of a copyrightedwork, including such use by reproduction in copies or phonorecords orby any other means specified by that section, for purposes such as criticism, comment,news reporting, teaching (including multiple copies for classroom use),scholarship, or research, is not an infringement of copyright. In determiningwhether the use made of a work in any particular case is a fair use the factorsto be considered shall include—(1) the purpose and character of the use, including whether such use is of acommercial nature or is for nonprofit educational purposes;(2) the nature of the copyrighted work;(3) the amount and substantiality of the portion used in relation to the copyrightedwork as a whole; and(4) the effect of the use upon the potential market for or value of the copyrightedwork.§ 106aSubject Matter and Scope of CopyrightCopyright Law of the United States 19The fact that a work is unpublished shall not itself bar a finding of fair use ifsuch finding is made upon consideration of all the above factors.
First, as a consumer, there is a provision in U.S. Copyright law (Title 17, United States Code) for "fair use". (I reside in the U.S.) This term is described in Circular 92 of the U.S. Copyright Office as follows:
Some of the on-line sheet music sources now provide downloads of single works. I got Mozart's "Rondo Alla Turca" for about $2.