Has anybody tried the newest version of Kontakt (v 5.4.1)? Does that improve the CPU spiking issues? I'm working on several projects right now and can't afford downtime if something goes wrong. 

Edouard

Out of curiosity, what sound card is everybody using? Call me crazy but I'm starting to wonder whether I should blame my UA Apollo for this madness...

Edouard

Yep, issues here, too. FWIW, I'm not using Berlin WW but Berlin Strings and I'm having issues with it.

More specifically, I think that some Kontakt scripts are incompatible with one another. I was having CPU and hard drive spikes (resulting in pops, cracks and audio dropouts) from playing a single note of Symphobia pizz strings. After doing some non-scientific tests, I realized that Adagietto and Cinematic Strings didn't like being in the same metaframe. Berlin Strings is also acting up when mixed with other libraries.

Note that I don't mix different libraries within a single Kontakt instance, which is all the more worrisome.

Unfortunately, I wasn't able to roll back to 5.3.1 (I regularly batch re-save libraries, which creates brand new Kontakt instruments, and prevents me from opening them in an older version of Kontakt).

I'm on a fast MacPro with SSD drives, 64go of RAM, OS 10.8.5, and run all latest versions of VEP, Cubase and (unfortunately) Kontakt.

Edouard

Yes, check this out: http://www.youtube.com/watch?v=4nl-yshkkxY

Labman - I use Cubase 7.03 on a MacPro (ML 10.8.3). The 3 Altiverb instances are used on auxes inside Cubase.

Dlpmusic - looking at theActivity Monitor, there is definitely a surge in processor usage during tempo changes using Kontakt inside VEP with Cubase (as long as Kontakt is tempo-synced to the host). While the Altiverb "fix" alleviates the distorting audio for me, I will do more testing to try to lower that usage (and possible resulting distorting audio).

On another note, I did remove the buses inside VEP, and that seemed to have dramatically reduced CPU usage, too. Instead of submixing VI outputs inside VEP, I just route the VI outputs to VEP outputs. It may be worth trying for you.

I did contact NI regarding the Cubase/VEP/Kontakt/tempo ramps combo, and they have been of no help whatsoever.

Edouard

Are you guys running Altiverb in your projects by any chance?

I was able to remove clicks and pops described by the OP by removing all of my Altiverb instances. It's worth giving a try.

Cheers,
Edouard