Specific project will not playback recorded midi. Helps!

Hey fellas.  Ive been working with Sonar for about 6 years.  Ive always come here to read about issues and have never run into anything or some odd anomaly that I couldnt find out how to make work in my DAW.  Until last week.  Got some new strings for my 12 so I did a nice recording of That's The Way by Zep a few weeks ago.  Got acoustic, bass, and vox all wrapped up and decided to put some shaker sounds in the last passage of the song.  Brought up NI Battery and my usual kit setup, and made a recording.  The midi event is there in the track, looks all good right?  Midi will not play back no matter what I try.  This is the first time I've ever been this stuck on anything in Sonar.  I've compared settings and screenshots across older projects that work perfectly, and I just cannot find the answer.  I do think its project specific, as I loaded up Rapture and it wouldnt playback in this project either.  Is there some obscure hotkey I mashed that will disallow midi playback in a project or something?  Would love to get past this, as I've spent a couple nights and about 4 hours tinkering with buttons and checking settings and I'm getting nowhere.  Im about to jump online and order a damn shaker and just be done with this lol.  I would love to hear if anyone has experienced this same thing, and where I need to be looking.  Thanks so much folks.  :)

Heya Keni.  Yes plugins are working just fine.  Global FX button is not lit, so I'm not globally disabling effects to my knowledge.  I've checked the I/O chain on associated midi / audio tracks and everything is routed properly.  I can record what I want, I get input echo, midi track shows key input, synth track for battery does as well.  The recorded event is there.  When I playback, the midi track shows that it is reading the event (the track meter lights up), but the synth track that should be showing me audio, is doing nothing.  Same thing for Rapture.  Headache : acquired.

Thanks, I haven't tried that.  However, I have deleted the synth and associated tracks, and readded and recorded again, with the same results.  No playback.  I will try this, but I am expecting the same results.

Werewindle - Have you tried the same things as me?  Deleting the tracks and synth, re record, try playback?  Insert a new synth, record, and try playback?

Ooooh....see that's where we differ.  I can go back to an existing project, or create a new one, and things work fine.  Do you get midi activity on the midi track during playback, but it just seems like its not routing it to the soft synth track?

I GOT IT!  It has something to do with the latency compensation and FabFilter plugins.  I had them set for high latency linear phase, switched them back to zero latency and BAM.  Playback is normal again.  What the hell?  I've never had this happen before.  It makes sense because this all happened post mix.  After I added the plugins.  So, if anyone knows, how do you mitigate this behavior?  How can I run this EQ plug linear phase without it dropping out my midi playback?  This is MADNESS!

Hey Brundle!  There's a name I know from reading these forums for 6 years or so lol.  Thanks for chiming in.  YES, I think you hit the nail on the head here.  I instantly thought of a buffer issue somewhere.  I believe I am using 250ms right now, which is default I believe.  I will bump that to 500ms and see if it resolves it completely.  Is that a global buffer setting or project specific?  I seem to remember it as a global.  Another note.  I started playback with all plugs disabled, and linear phase on in the FabFilter ProQ.  As I enabled the first, playback was ok.  Enabled second, I got half the midi notes.  By the time I enabled the third EQ, midi was gone lol.  So the introduction of this latency little by little was indeed interesting.  I will try the buffer setting.  :)

Brundlefly.  You win teh interwebs.  700ms was the answer.  Now, is there any consequence, or dependancies, on this value?  CPU cycles?  If there is one thing in SONAR that has always boggled my mind, it's all of the buffer settings.  ASIO buffers....I get that.  But this buffer for example, never have needed to touch it.  Also, those read / write caching buffers.  Does anyone actually use that?  Again, big thanks.  I can move on to more important projects now.  :)

Glad to help Yes, it's Global. X1 lowered the default to 250ms, and a lot of systems (including mine) don't do well with the buffer that low. The old default of 500 works well for almost everything. Going a little higher as you did shouldn't cause any problems.