From Andrew Stiller, Kallisti Music Press
Subharmonics are nothing new (30 September, p 60). George Crumb scored them in his 1970 string quartet Black Angels, and I described them (as “undertones”) in my 1985 Handbook of Instrumentation. They can indeed be elicited from any bowed stringed instrument, as well as from certain woodwind and brass instruments, and even drums.
Philadelphia, Pennsylvania, US
