I really like this solution, as it produces a very atractive phrasing: the seven stroke roll is nicely tapered down, resulting in a very elegant and musical diminuendo. Also, the hand alternation cannot be heard, making for a very smooth and homogeneous phrasing.
Despite what it may seem, that is not difficult to play (if we know how to do it). In my previous article
“Snare drum technique. The roll”, I wrote about rebound control and included a video showing up to eight controlled rebounds.
This is what I do on the video: I play a six-stroke controlled rebound with my right hand and resolve it with my left one to complete the seven stroke roll; then, I use my right hand again to strike the remaining three eight notes of the bar. I am also using a “trick” that I explained in the above mentioned article: I am moving horizontally across the head to facilitate bouncing but, if you noticed it, I am not moving my stick as much as Mr. Ames does (I am also moving more in a diagonal line instead of “vertically”, trying not to get an evident timbrical change).
Moved by curiosity, I wanted to check if there was visual corespondence with what I heard and, using an audio editor, the graphic result of this one-handed “Scheherezade” is a follows (bare in mind that a double wave is featured because the audio was recorded in stereo):