I found a few rattles in the past by driving down an alley with buildings on both sides. It amplified the sound. Then i drove with the drivers side door open back and forth till i found out what was making the noise. Pain staking for sure but i finally found out HOW to find it. Sound is crazy. You think it's coming from one place but then when you nail it down you find it's coming from somewhere else.....

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….