If you're trying to beat match 2 tracks, and they're playing together for more than a few seconds, this becomes frustrating. A test I do is play 2 copies of the

If you're trying to beat match 2 tracks, and they're playing together for more than a few seconds, this becomes frustrating. A test I do is play 2 copies of the same record simultaneously and see how long it takes to noticeably go out of sync, given all other variables matched as closely as possible.