Desperate twisters is right about BBQ. But if its for home recording and not live playing live I recommend just overdubbing the tambourine separate cuz sometimes I want tambourine on off beat instead, plus with the BBQ method the tamb can tend to get slightly off n really muck up your rhythm and since it is so high frequency it will be super obvious. Hey, mark sultan overdubs so I don't feel it breaks any rules. For an example of a tambourine being off the ENTIRE song check out kk @ BBQ's "love you so" from the s/t release. Awesome track but goddamn is that tambourine on its own rhythm!