Rolling In Rhythm from Charley Wilcoxen’s Modern Rudimental Swing Solos for the Advanced Drummer. Practice using wrist control at a slow tempo, relax the bounces at a faster tempo while still controlling the second bounce.
See Also:
How To Play The Double Stroke Roll
https://www.youtube.com/watch?v=j0w1Ji964CI&t=1s
Double Stroke Roll Exercises
https://www.youtube.com/watch?v=wIMb5kvxL4c&t=1s
0:00 - Intro
1:11 - Played at 110 BPM
2:22 - Played at 178 BPM