Well I checked and apparently have the same unit as you. Maybe I am using my other units more and have not noticed a timing problem because I don't use the JV-2080 as extensively as you do. I still think that I am used to the timing of my older gear, so I didn't notice anything different with the JV-2080.

The CD project I was involved with, though, included a JV-1080 and a JV-2080 (neither of them mine) and we didn't come across any timing issues.

This is disappointing to know that I can look forward to midi slop if I try to use the module for very note intensive music. Do you think the difference could be the computer connection?

I would be interested to know what computer and midi device you are using, because I am trying to integrate my setup with a computer and don't understand all the connections needed. I have put that aside to play on the internet anyway, but I am looking to get serious with my setup once again. I have a Pentium III 600Mhz computer and a MOTU MTP-AV midi merger. The sequencer program I am attempting to learn (though this is very difficult) is Cubase VST/24.

I notice that the response of the sequencer itself is not the greatest--the metronome and sequences don't start and stop exactly when I press start/stop. I have never had this problem with my MC-50. I am thinking that perhaps this is common with software sequencers and is causing the midi timing problems with the JV-2080. Just a thought. Aside from the start and stop of the sequence, I haven't noticed any timing anomalies.