The Treatise on Harpsichord Tuning was the first French document to
discuss keyboard performance practice in any detail. Jean Denis was both
a harpsichord builder of renown and the organist of a prominent Parisian
church, and is thus an authority worthy of careful study. The treatise
addresses numerous matters of interest to both scholars and performers,
including temperament, ornamentation, fugue, and the use of the organ in
liturgical practice. Also included in the treatise are a keyboard
prelude designed to reveal errors in tuning, and two delightful
anecdotes attesting to the power of music. The forthright character of
Denis's writing lends a unique and distinctly enjoyable tone to the
work.