Based on what? The opinions of men? "Syncopation--shuffling, shuffling, crooning, syncopation...The jazz tonight has almost roused me to an orgasm." Anais Nin, diary entry, November 10, 1932. Timbrels and brass were not used for rhythm in ancient Israel. Semetic music was arhythmic, as was its poetry; no regular metre. Not true. (See above.) Instead of asserting arbitrary assumption as irrefutable fact, you folks should study the issue. Back to psalms, hymns and spiritual songs. These are specific forms of music that Paul said we should employ in our interaction. So, instead of citing vague, uninformed platitudes concerning music, I want to know whether or not these were "rhythm-based" (to quote the cumbersome term,) and I want to know how you know.