My looping problem with X2

   So here it goes. Set up a couple of SD3 drum clips, turn on the loop button and set from start to end on the ruler. Start the loop to insure timing on the turn around is good.
Now arm a trk to record and record lets say 5 take lanes. I'll solo out each take lane to find the "keeper" delete the junk and collapse the take lanes so my take is back in the channel. Press play to hear the loop. Now here's where it starts to get messy. Each pass of the loop gets further and further away from being on time.
 Now not 100% sure on this but, I do beleive I have tried with & without "Remove DC offset" aswell as "Nudge".
Any idea's on this?
 
Kev.

I have the same "out of sync" issue when looping playback. 

I'm on Windows 7 64 with Sonar X2 64 pro, but had the same problem wit X1 pro when using Fxpansion Geist (64 bit). I've seen others post about, and it's a nuisance (especially in the composition stage when I'm vibing and clicking).
Wish I didn't have to, but I been working around it by drag copying clips out to a suitable length

I confirm I've seen this too.  X2 32-bit on W7 64.  I noticed it immediately as I went from 8.5 to X2. Maybe the midibuffers setting could fix. I tweaked mine off another thread a couple of days ago, but haven't done any serious testing yet as I've not needed to loop for long periods.

Thanks Brundlefly for reminding me about my drivers...I had to change them from ASIO to WDM Pre quickfix 308 and forgot to try the ASIO again. So I switched back and tweeked the buffers. Don't know if that was the culprit but it hasn't drifted off time sence.
Best of luck to the rest of you dealing with the drift.
Thanks again.
Kev

I switched back [to ASIO drivers] and tweeked the buffers. Don't know if that was the culprit but it hasn't drifted off time sence.

Glad to hear you got it fixed. In my experience, the great majority of these looping sync problems turn out to be hardware/driver/config/synth-specific issues.


One bonafide bug to be aware of is that having a MIDI FX on any track (regardless of which one, and whether enabled or not) will cause SONAR to play some notes from the measure following the end of the loop range, which can have the effect of making things sounds out of sync, though the error should be consistent, not getting progressively worse with each pass. I just confirmed this bug persists in X2. 


Personally, I've never been able to replicate a progressively worsening sync error when looping, though I've tried many times with different synths and scenarios in various versions of SONAR over the years when it's been reported by others. This is why I tend to think it's probalby due to some sort of hardware/driver interoperability issue in most cases - possibly involving O/S and even motherboard/chipset-level issues that make it difficult or impossible to troubleshoot remotely.

The worst I ever see is that if you try to null a live MIDI-driven synth against a bounced audio track, you might hear a trace of a transient right at the beginning of the loop, and if you start-stop the project inside the loop, that error may persist throughout the loop. But this error is on the order of a sample or two, does not get progressively worse, and is only audible when doing a null test. You'd never hear it as a timing error in normal circumstances. WDM driver mode seems to be more prone to this than ASIO, which is one reason I prefer ASIO.

This phenomenon may also manifest more with some synths, depending on how consistently they render MIDI to audio from one pass to the next. Session Drummer is not the best in this regard, but again, I wager you'll never be able to hear it unless you're trying to null live MIDI-driven playback against a phase-inverted bounce.

All that said, there does seem to be an inordinate number of new reports of this drifting sync problem with X2, suggesting that some change might have been made to the audio engine (maybe in conjunction with attempting to make playback more "gapless") that might not be playing nice with some environments.

They are NOT wholly hadware config related issues and are quite easy to replicate.

I can't vouch for the Matrix since I really don't use it, but I'd be interested in seeing a reliable, hardware-independent recipe for reproducing a VSTi sync issue not involving the Matrix. The one you used to report this bug to the Bakers should do nicely. 

I found a timing problem a while back when trying to sync to SMPTE.  Yeah I know...who in the world sync's to SMPTE these days?  Well...I did up until Sonar X1.

What I found is...that everything will play back in sync to SMPTE EXCEPT soft synths.  The same thing happens as what was described above....the longer it plays the further out of sync it becomes.  Stop and restart playback and everything is in sync again....for a time, then starts drifting off again.

Audio tracks and midi hardware tracks will stay in sync with SMPTE for ever.....but NOT soft synths.  Strange, but true... :) .