Doublebeat 9000 is an ostinato-based jammy jam for the groovy drumline. Its inherent challenges lie in the nonstop repetition of swing-style 16th notes for the snares, melodic-based diddle patterns for the tenors, and bottom feeder running lines for the basses. This piece could be a cadence, a stadium groove, or simply something for after school. From the mind of Murray comes another vehicle of danceable battery music for the drumline consumer—BUCKLE UP FOR SAFETY!