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Instances and thread count with quad-core
Last post Wed, Oct 11 2017 by Paul, 6 replies.
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Posted on Wed, Oct 04 2017 18:45
by McArnes
Joined on Sun, Aug 27 2017, Posts 93


how many instances can I have with a quad-core Intel Core i7-7700K Kaby Lake Prosessor and what do I choose for thread count settings per instance?

Posted on Thu, Oct 05 2017 14:28
by Synetos
Joined on Mon, Jun 22 2015, USA, Posts 120

It is a good question, with a lot of possible answers. So many variables come in to play, such as: Library, how many instruments, all concurrent playback, daw, sample rate, buffer settings, etc.

It is pretty hard to have a guess, based on the info you provided. If you share more of what you are trying to do, there may be some folks here who can chime in and give a starting point. 

So much will just depend on your workflow and what you are trying to accomplish. Best advice is probably just experiment. 

At the moment, I am using 3 instances on my local host. Each instance gets 3 cores. I have preferences set with 8 midi ports (128midi channels) 256 outputs and 64 inputs on each instance. I am not even using any slave machines at this time.

I have a 10core CPU without hyperthreading enabled. I leave one core for DAW. I record at 48khz sample rate, 24bit, with a 256 buffer. Each instance VEP connection is running with 2 buffers.

This works for me, for how I work. But, I am not doing giant orchestral stuff. I have 256 instrument slots setup, and then I use one instance for pure Send effects. It keep CPU hog plugins from getting in the way of my DAW.

All that said, I am still learning new ways to use VEP by listening to others and just trying things out. That is the beauty of it all...you can make it your own rig, exactly how you like to work.

Nuendo 11, Waves SoundGrid

DAW:i7 10700K/64gb VEP:i9 7980XE OC at 3.6ghz/128gb

Waves eMotion LV1/64 - Digigrid IOX's - Waves Soundgrid Extreme Server
Posted on Thu, Oct 05 2017 17:09
by wwzeitler
Joined on Sat, Jun 06 2009, Los Angeles, Posts 63

You say nothing about RAM or what kind of disk drives you're using.

You can't have enough RAM. If anything, RAM will help mitigate disk drive performance with disk caching. And each core will be able to get more done.

They're now making hybrid SSD/platter drives -- in other words, a really big cache on the drive itself. I've switched to those with noticeable performance improvement.

But on the whole I'm impressed with how well Vienna worked in days of yore doing large orchestral work (200+ tracks) when I only had 16g of RAM and SATA 2 drives. And Vienna only gets better.

Composer :: Glass Armonica :: Piano :: Organ
Posted on Thu, Oct 05 2017 22:52
by McArnes
Joined on Sun, Aug 27 2017, Posts 93
Thank you both of you!

I have VEP on a slave PC, and it has 64GB ram and only SSD drives. It is only running VEP and I’m building my template now. I’m aiming for a full orchestral template with all usual orchestral instruments, choirs, ethnic, guitars. On the master I have Cubase and some softsynths.

Posted on Wed, Oct 11 2017 07:11
by McArnes
Joined on Sun, Aug 27 2017, Posts 93

Any thoughts about this?

With a quad-core, and 8 threads available, can I have a maximum of 8 instances, right?

Posted on Wed, Oct 11 2017 07:24
by Paul
Joined on Sat, Aug 03 2002, Vienna, Posts 13431

Hi McArnes, 

You can also load more than 8 instances, but I'd try lower thread settings, like 1 or 2 threads per instance. 


Paul Kopf
Product Manager - Vienna Symphonic Library
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