"A first rate book for aspiring composers. The drawings are clear, as are the explanations of ideas and sounds; the variety of material is tremendous and it is very easy to use, with the authoritative clarity which abounds in every chapter. It is both scholarly and inspiring, definitive and comprehensive; a milestone in the search for new timbres which is the cornerstone of Turetzky's philosophy, at the same time futuristic and deeply traditional. The search for timbre is also the search for beauty."
The Musical Times
"[A] most instructive book . . . an important handbook for composers and players alike."