This relates to my old, old same handed flam accents post, and my more recent left hand lead developer post. This is very left hand-intensive, with a lot of those same-handed flam accents I like so much, and some flam drags and partial pataflaflas. I'm making videos today— maybe I'll post a video of me playing this a little later.
Repeat as many times as you like and end at the fine in the second complete measure. You can play the rolls open or closed— double stroke or multiple bounce. I'm playing them multiple bounce. 7-stroke rolls here have a 16th note triplet pulsation. The 11-stroke rolls have a quintuplet pulsation— this is a more common thing than you may think. At certain tempos it gives a better sounding roll than a 16th note or sixtuplet pulsation. The quintuplet pulsation should tell you this piece will be played fairly slowly.
Observe the dynamics on the long roll at the bottom of the page— there's a fp accent at the beginning, and the rest of it is soft, and it ends soft. Alternatively, you could start it strong and do a long decrescendo, ending pp; or if you're a crass SOB, you could start it softly and crescendo to the end.
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