see right at 2:50, it becomes apparante when the rest of hte music shuts off...it kind of clips the speakers a bit, if u look at it on a levels meter, ull see it will hits omething in the bass, its because the actual tumbi sound is creating beat of its own in a sense. Anytime a strike is happenign on a string, it tends to create a noise (i.e a piano hammer hitting a string, a pluck hitting a guitar....these are different from lets say a flute, theres no hit there...so u get a little bit of the hit kick in there). Its nothign bad...just noting, that if u ever wanted to make ur tumbi more clean or have only the high sounds on it, u could eq it.