I’ve been fascinated by harmonic singing for a long time, ever since I first heard that it was possible for singers to produce more than one pitch at a time. There are different musical traditions that make use of harmonic singing, but to me the most interesting is the traditional music of Tuva. While I’m no expert, my curiosity led me to explore the techniques and taught myself the basics.
Mike Ruiz is a former colleague of mine. In addition to being a fine classical pianist, Mike is a physics professor at the University of North Carolina at Asheville, where I used to teach in the music department. I’ve enjoyed picking his brain in the past about acoustics and recently Mike asked me to assist him with some physics education articles and videos he was producing. He was interested in trombone multiphonics, but in the course of our conversation I mentioned the harmonic singing. The resulting article is called Tuvan Throat Singing and Harmonics. The abstract can be read here. Here’s the video abstract.
At the same time that I demonstrated the Tuvan throat singing technique for Mike I also demonstrated trombone multiphonics as well, including some techniques that incorporated the throat constriction used for harmonic singing. When I put together trombone multiphonics with harmonic singing I have been able to come up with some interesting sounds that are similar to what you might hear on a didgeridoo. If and when that paper gets published, I will post about it here too.
In the mean time, here’s an older post on trombone multiphonics.