Progress so far (all done during leisure time..)
All tracks are 64bits vsti unless specified. Simple instrument track is used.
All drums are playing a simple 8th beat pattern. Bass and other synt plays the same note transposed up 12 notes (for string/synt), so any out of sync track can be monitored easily. All in 4/4 time.
6 tracks/instances of Session Drummer 3 (where 2 tracks are froozen)
1 track of BFD 2, just play along with one of the presets.
2 tracks/instances of Kontakt Scarbee bass
1 track of Kontakt Scarbee funk guitarist (the most exciting sound for the test :)
1 track of 32bit Synt 1 (added after reading the above BitBridge issue)
1 track of Studio Instrument String
Drums are sent to bus 1 (drums)
Bass to bus 2 (bass)
In each track, including bus, the pro channel default compressor is turned on.
...section is looped for 12 bars, playback at least 10 mins.
No problem of out of sync. Save project.. rest.
This morning when I open the project (it took some time to load).. there is no sound. The audio interface works, playing regular mp3 files, etc.. After a few tries, I decided to open my simpler project - engine works fine.
Opening the test project, now works again. Strange.
Continue test. Export the above tracks to a wave file.
Import back the same wave file into 8 audio tracks. Add Guitar Rig 5, 4 and TH2 to 3 of the audio tracks.
Still running, more than 10 mins now.. no issue yet.
@stickman393 : just read your message .. I'll try to add some diff time signature on my next round.