Music Theory Online was launched experimentally in March 1993, after which issues 0.1 through 0.11 were published. Its permanent status was marked in January 1995 with the publication of Volume 1.1. MTO contains articles, commentaries on articles from previous issues, reviews, and essays all related to the field of professional music theory.
MTO is peer reviewed and is indexed in RILM, Music Index, and other periodical indexes. MTO is accessible free of charge through the World-Wide Web. If you value MTO and other free SMT services, please take a few moments to join SMT. Membership grants a number of benefits which non-members do not enjoy.
The Society for Music Theory also publishes the print journal Music Theory Spectrum, which is included in SMT membership.