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1.
a process of building a set of four bass drums in two two-peice sets, one drum on-top of the other so it looks like this = =....- = one bass drum. then playing them in an out of time fashion so as to increase the sound speed produced.
"chuff chuff chuff, Man those quadruple bass drums are fast"
by Chris Lewis / Seamus Bradd September 21, 2003