Sticking notes

This could be an issue with the module, a bad MIDI track, or the MIDI interface. One thing you can try is increasing the MIDI buffer size, labeled "Prepare using N millisecond buffers" under Options -> Global -> MIDI. The default value is 500ms; try increasing it to 700 or 800ms.

2 things on this subject:
1) As I  said, I did inc the MIDI buffer size, as Bitflipper had suggested. It's on 500, and it had been on 250. Today, again while playing several piano patches for 15 or 20 min, the note sticking recurred. I guess I'll now go to 750, and see if that helps. ANy other suggestions would be welcomed. Again, after this occurred, it continued to happen with each voice I played, until I repowered. ANd, it again just occurred on 1 note.
 
2)On an unrelated note, I ran into a problem with using the IPad with my Roland Integra-7/Sonar Producer 8.5 setup. When I load a midi file that's I've downloaded from various places online, it will send MIDI messages that change the patches in the Roland. When I then go in and disable program, bank, and exclusive on the  ROland, that doesn't occur anymore. However, I then (understandably) can't control the Roland from my IPad anymore.
Thus, I would think that I need to be able to tell Sonar to stop sending such messages. However, when I looked into this about 6 months ago, I seem to remember that Sonar was not particularly good at doing this. Any ideas out there? I know someone had said to put in some blank measures at the very beginning, but I don't think that would help--even when I start the song from the middle, Sonar again changes the sound and patch that I had chosen.
Thanks.
LNovik

OK, I think I'm making progress with your assistance. Thank you, Johnny at Cactus Music, for that suggestion. I have tried two things in the past week. FIrst, at the suggestion of Roland support, I simply played by new Integra-7 MIDI'ed straight from a keyboard, instead of going thru Sonar. After about an hour of playing, I did not get any sticking. That would imply the Sonar software, though why does it never stick with my Korg or Yamaha keyboards?
Later, while again playing thru Sonar, the sticking DID recur. I did do what Johnny suggested, and hit that button right next to the AUdio Engine button, labeled something like, "cancel MIDI in and out.". It did work perfectly; that is, the sticking note stopped immediately--and remained unstuck when I resumed playing.
 
However, this was when I was simply playing piano on the Integra-7, and not even multitracking. I mainly bought this instrument to be able to play multiple tracks at once, and if it continues to stick while just playing piano, I would think it would occur even more with the multitracking.
 
I guess I'll now finally get to what Bitflipper suggested, and increase the MIDI buffer size to 750. I assume I don't give anything up when increasing my MIDI buffer size from the 250 value it was on before, all the way up to 750--although I have no idea. IN case anyone knows any problems that I could incur from doing this, please let me know. ALso, if by describing my problems and progress so far, if anyone can figure out a reason why all this is occurring with my setup, I'd also very much appreciate that input.
Thanks again.
 
PS: Keyboard Mag just said that the Cakewalk site has one of the best support FOrum sites, and I agree.
LNovik

No, I'm not using USB. I use a 4x4 Midisport interface, and I don't think that's connected to a USB port. ANy suggestions with this type of setup?
LNovik

I think you might have just found the source of the problem. Start looking into threads regarding issues with midi sports, I think I've seen this come up before. 

Yup, MidiSports have a long checkered history. Check with M-Audio to see if there are updates available, not only for the Windows driver but also for the unit's firmware, which is upgradable.
 
This wouldn't explain 88fingers' problem, though, unless there is some common problem between the two M-Audio products. Not an M-Audio user here, so I can't testify one way or the other. BTW, you'll see reports of stuck MIDI notes in conjunction with all interface manufacturers, even the ones generally considered a cut above M-Audio, as well as on all DAWs, both PC and Mac. It's a widespread problem, has been for years, and may come down to the fact that MIDI is, at its core, a very slow medium that can be prone to buffer overruns.
 
You're not by any chance using a USB hub, are you? Or recording to a USB-connected external drive?
 

I also sent a note to M -Audio, and hope to hear from them soon. I even sent a link from this discussion, with an
explanation, to the Roland support staff. However, as I think of this, I'm not quite sold that the problem lies with the interface. I have several other synths, such as a Triton, Kronos, Roland XP30 and JV 880 synths, as well as a Yamaha Motif. I just don't see problems like this with any of these other synths. ANd that's with using the same interface and software. I do remember occasionally getting  some sticking of a sound with one of the other synths, but it was pretty rare. With what I believe is some association between Roland and Cakewalk, I would think they would be a little more motivated to try to figure this one out. For instance, I think when I have gotten some sticking on, ie, my Triton, all I had to do was switch to another preset, and the sticking went away. As I have said, when the sticky note starts on my Integra-7, that note continues to sustain no matter what preset I choose. Only powering off and on fixes the problem.
Thanks for listening and contributing.
LNOvik

Thank you Mr Novik for the input.  I spoke with a Cakewalk tech in Boston today and he asked me to try a few things. this is what he said to try.
Open the Preferences > Audio – Playback and Recording to uncheck the "Always Stream Audio Through FX" box. Click [Apply] then [Close] to return to your project.
Try increasing the MIDI buffer in the Preferences > MIDI – Playback and Recording up to 2000ms.
Solo one of your MIDI tracks to see if playing only one at a time results in stuck notes or not.
Now I did mention to him that I never had this problem when using Sonar LE.
so with that said, here goes nothing. By the way, I tried the Roland interga 7 two weeks ago, "what a machine" love it!!!!!

I have several other synths, such as a Triton, Kronos, Roland XP30 and JV 880 synths, as well as a Yamaha Motif. I just don't see problems like this with any of these other synths.

 
Just some anecdotal information: I've had more problems with sticking notes using synths / MIDI controllers that feature true note-off messages [8nH with a release velocity component].  I've compared them side-by-side with 9nH v=0 note off messages in the same projects, but without experiencing the same stuck note problems.
 
This stretches back to at least Sonar 3.x and Project5, if not before.  Having not researched your synths' MIDI Implementation Charts, I don't know if any of this applies.  I'm throwing it out there as another potential explanation.

Somehow I think a MIDI buffer of 2000 will cause trouble, Most set this from 500-800. 
 
I use almost all of Sonars defaults that it chose it's self when I installed it. 
It seems to have a way to choose the proper parameters and for the most part they have always worked for me. 
I did change my MIDI buffer to 500 even though I was having no problems. 
 
ASIO is the preferred driver mode by 90% of DAW users.
But as said, ASIO is an Audio driver, not sure it has anything to do with MIDI. I think windows uses generic drivers for midi. 
 

LNovik
 
Open the Preferences > Audio – Playback and Recording to uncheck the "Always Stream Audio Through FX" box. Click [Apply] then [Close] to return to your project.
 

This is a new setting in SONAR X3 replacing "Play effect tails after stopping" , I believe it was added as part of the VST3 enhancements. It is not in older versions of SONAR.