The Sound of One Man Clapping

A good way of testing a round-trip live internet media stream is to clap with yourself. If you can get the beat you’re clapping to match with the beat that you’re hearing, then you’ve found how long the latency is (that is, unless you’re clapping way too fast, and are on a frequency double or triple–find out this by stopping clapping, you should only hear one more than you clap).