Method
By slightly closing the back of the throat and letting air pass over the folds of skin, a growling sound can be performed. This is an effective technique, and is often used to approximate the fluttertongue effect by performers that can’t roll their tongues. It is achievable across the entire dynamic range, although louder dynamics are somewhat stressful to the throat muscles.
Necessary information
As mentioned above, the loud performance of this technique can be fatiguing over a long period of time. This technique can be done on its own, or in combination with singing and/or buzzing.
Some performers may not be physically able to perform this technique, or to perform it for longer periods of time. As with some of the more extreme techniques in this guide, it must be noted that extensive use of this technique may not be performed as intended when performed by a wider pool of tubists/euphonists.
Notation
Any clear notation that mentions the application of the technique is acceptable. Since it is often combined with singing or buzzing, it is suggested that some sort of overlay is used to depict the technique, rather than an alternate notehead. This notation is used in the musical example, and it is similar in form to many examples of the technique that the author has seen in other compositions.
Relative Difficulty
Advanced to Professional
Works to consider (bolded titles are particularly representative examples of this technique)
Ursa – Libby Larsen
The Clock Tower – Roy D. Magnuson
19 E. Main St., Alhambra, CA 91801 – Nicholas Deyoe
The Composer's Guide to the Tuba 