Frank Denyer (born London, April 12 1943) is a composer. His music uses a combination of conventional instruments and new, unusual, and structurally modified instruments. Partly due to his studies of non-Western music, much of Denyer's music is microtonal. Denyer was a chorister at Canterbury Cathedral and later studied at the Guildhall in London. In 1966 he co-founded, and was director of, the Society of Hermes, an arts club for new music, painting, poetry and theatre in Shepherds Bush, London.