Garritan Glitching on Mixdown

I hope someone can help with this:

I have searched this forum to find whether it's already been addressed.


I have Garritan Personal Orchestra.

I have recently also bought sonar X1 studio.

My computer is running Windows XP SP3.  It has an Intel Quad CPU Q6600 @ 2.40GHz.  It says it has 2.75GB of ram.

I've been writing some music for an animation.  I have only used 4 patches in the GPO - the rest is covered by Sonar's own SI-strings (2 instances) plus Applied Acoustic Sytems' Tassman (1 instance).

I think this is quite modest.

When I use the mixdown function and play back the file I get audible glitches but only in one channel.  When I remove the GPO the glitching no longer occurs.


Do you have any idea why this might be happening? Can you offer any advice? 


I have a deadline (end of this month) and also other commitments, including a "day job".

any help gratefully recieved, Paul.

Thanks.  The 64 bit double precision engine was already disabled. 

I tried turning of fast bounce. It made no difference.

Here's what I posted back on SONAR X1 Porducer, Studio and Essential:

Sorry but what is meant by real time and offline?

I used Fille | Export | Wav

The file that was output had glitches. I also tried "freezing" Garritan.  This froze the synth output complete with the glitches.

I have been emailing Garritan support and they suggested increasing the DMA buffer size.  This didn't work either.

Something which does work is to create 4 instances of Dimension LE (or as many as you have parts) and then use Garritan Pocket Orchestra which of course means compromising on patch choice: it has only one keyboard the harpsicord - not really right for a piano part but I may have to settle for it.