[LAD] transport/timebase calculations

Hi, I can't see what's wrong with the calculations I'm performing for timebase/transport in my JACK app. I'm not sure where the error lies. I keep looking and looking at it, changing bits, experimenting, and still not getting the desired result. Everything is playing too slow. For example, @ 120bpm 4/4 time, the second (or third) bar starts almost an entire beat too late. Please could someone take a look at the calculations and see if there's something obviously wrong with them? The source can be viewed online at: http://github.com/jwm-art-net/BoxySeq/blob/master/jack_transport.c The poll function starts at line 169 the jack timebase call back starts at 226. The code was originally based on non-sequencer or dino or some combination of both. It is also a bit grumpy with other JACK apps which use transport, but I trying to fix the time keeping first. TIA, James.