2500 JJOS - Version 5.56

Hi Guys, I got a 2500 a couple months ago, and it has installed JJOS Version 5.56. Not finding any info about this anywere? Were along in the 2500 JJOS is this? I have some slight midi issues with external synths triggering incorrectly at start of sequences. This was probably corrected later, not sure. Any info would be helpful. Cheers

That's the latest version of the OS1, link below:

http://www7a.biglobe.ne.jp/~mpc1000/mpc2500/old_os.htm

im running the latest osxl on my 2500 and i still find it does odd things to my external synths at the begining of sequences. like the note decay/sustain is wrong, and it only plays correctly once the sequence loops!
anyone else get this? it seems to happen more on output B. strange!!!!!

Yea I have this issue, but it happens on MIDI A as well, I am running an older OS then you though. But yea, its like the sequencer misses the first few notes, but then catches it fine next time it loops around. Annoying if you are recording out a beat. I just wait till the end of sequence, stop it, then hit play, instead of the start.play (or whatever its labeled) Also annoying when adding new MIDI parts, need to jump in on overdub, haha