W. A. Mathieu

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William Allaudin Mathieu (b. 1937) is a composer, pianist, choir director, music teacher, and author. He studied Indian vocal music with Pandit Pran Nath. Early in his career he worked as an arranger for Stan Kenton. He was the original director of the Sufi Choir founded in 1969 in San Francisco among followers of Samuel L. Lewis.

His books include:

• The Listening Book (1991) Shambhala. ISBN 0-87773-610-3.
• Harmonic Experience: Tonal Harmony from Its Natural Origins to Its Modern Expression (1997) Inner Traditions Intl Ltd. ISBN 0-89281-560-4.

Harmonic Experience is an autodidactic ear-training and sight-singing book that uses singing sargam syllables over a drone in a just intonation system based on perfect fifths and major thirds.