Yes, I have the information from your tip, but just couldn't seem to "get my head around it". :-) I tried testing on midi files ranging from 96 ticks/qn to 480 ticks/qn, and could only get good results with perl if I used a different equation for each range...sort of a lookup table. However, the gnmidi utility was always correct, and the various midi players also report correct time. The gnmidi source is not open source, so I can't see what he does, but I may look at the open source midi players, and see how they compute it in C. It's got to be a simple equation, yet it's implementation eludes me. :-(