! would do it by ear, but you can also use Google calculator for unit conversions like this. In the Google search box type "(1 minute)/120 in milliseconds" and you get the answer "500 milliseconds". This tells you that one beat at 120 BPM is 500 milliseconds long.
--
Mark Smart
http://cdbaby.com/cd/marksmarthttp://www.marksmart.net
