William Allaudin Mathieu (born 1937) is a composer, pianist, choir director, music teacher, and author.
Mathieu studied jazz composition with William Russo from 1954 to 1958; Eurocentric music with Easley Blackwood from 1963 to 1967; Middle Eastern music with Nubian master musician Hamza El Din from 1971 to 2004, with whom he also collaborated; and raga with North Indian vocalist Pandit Pran Nath from 1973 to 1996.
In the late 1950s and early 1960s (as Bill Mathieu), he spent several years as an arranger and composer for Stan Kenton and Duke Ellington orchestras.
Mathieu enjoys sharing his tuning expertise with others, including beginners — and especially those who are convinced they are tone-deaf.
He now devotes himself to practice, performance, recording, composition, teaching, and writing from his home near Sebastopol, California.