Sync issues in LPX - strange behaviour

I've started a song comprising 4 Virus tracks, two ESX24 tracks, and another soft synth drone track. My mbp handles it easily. Here's the strange issue...

I've written in the notes to a simple arp style in AMaj7, then EMaj7, using a nice brass type patch on one Virus track. Lots of reverb too. On the other track I have a huge piano type sound, and a single note deep drone on another.

When the active track in LPX is the TI, everything plays back perfectly, all in sync, lovely TI reverb, and I'm pleased with it. However, when the active LPX track is anything but the TI, the Virus goes all weird on me, with weird sync issues, clicks and timing pops etc

Any ideas why this might be happening?

Zitat von Marc

what's your soundcard and I/O settings?

Hi Marc

I am using a Focusrite SaffirePro 14 sound card, very good quality and works perfectly.

My I/O settings are those needed for correct use of TI, nothing has changed there.

Trying to figure out if I can upload an image to here, Marc - to show you my settings. Here's what they are.

Core Audio: Enabled
Output Device: Saffire
Input Device: Safire
I/O Buffer Size: 512
Processing Threads: Auto
Process Buffer Range: Small
Multithreading: Playback Tracks
Summing: High Precision (24 bit)
Rewire Behaviour: Off