Hi Ralf, > Btw. to the list and off-list more and more people subscribed to LAD > experience MIDI jitter on modern computers for every OS.
You're quite right to keep mentioning this issue, and I do appreciate the time you've put into testing to prove the point. > OTOH using the > rtai kernel patch, controlling CNC should be possible without micro > controllers. I wonder if Linux audio is using the best rt patch, resp. > if it's possible to use the rtai patch for audio too? That patch is not something we've looked at yet, but I'm sceptical that the realtime kernel is the cause of your MIDI problems. If they got this right in the 80's, on computers which could not do anything near realtime audio processing, then I think it's more likely to be a question of MIDI application design. Have you tried running the test on Ardour 3? Also, we have less on-board MIDI controllers now, and more USB, which I suspect might be contributing to the problem. Looking at the thread here: http://forum.cakewalk.com/tm.aspx?m=1178006&mpage=3 it seems that Logic 5 and Logic 6 had tight MIDI timing, but in Logic 7 it got worse. Other proprietary sequencers are reported as having really bad or variable jitter. Have you seen this page? http://openmuse.org/transport/fidelity.html See also this IBM paper from 2001: http://openmuse.org/noncpl/MIDIWAVE-ICMC2001.pdf Cheers! Daniel _______________________________________________ 64studio-users mailing list [email protected] http://lists.64studio.com/mailman/listinfo/64studio-users
