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Does VI Pro not support Multi-core processing?
Last post Mon, Mar 28 2016 by FredB, 3 replies.
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Posted on Mon, Mar 28 2016 06:23
by P.Posayanonth
Joined on Sat, Nov 23 2013, Bangkok, Thailand, Posts 39

Hi VSL users,

I'm doing music production on Macbook Pro Retina 15" (CPU Quad Core 2.2 GHz). I notice that there is some distortion due to CPU overload when I'm using VI Pro as an instrument plug-in in Logic Pro X. However, this never happened if I use Vienna Ensemble (not Pro) as a multi-timbral host for VI Pro. When taking a closer look, I notice that VI Pro only use 1 core of my cpu, while VE utilizes every core efficiently. Is there any way to solve this problem? 

CPU screenshot 1 (VE) : https://www.dropbox.com/s/g9c695h30bo7tot/Ex_VE.png?dl=0

CPU screenshot 2 (VI Pro) : https://www.dropbox.com/s/lmldxaxhuvrzhed/Ex_VI.png?dl=0

Thank you,


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Posted on Mon, Mar 28 2016 08:14
by DG
Joined on Wed, May 12 2004, Posts 8608

I think your problem is Logic related, so I would suggest looking there first.


Nuendo 6.03, 4.3
2 x Intel Xeon x5675 3.07GHz Hex Core
Windows 7 (x64)Pro
RME Multiface II
ATI HD5400 series graphics card
Posted on Mon, Mar 28 2016 14:15
by FredB
Joined on Sat, Apr 01 2006, Montreal, Posts 669

Before Logic X 12.2.2, Logic was processing any record enable virtual instruments on a single core to avoid latency.  There is a buffer for Playback and another buffer for live channel strip. If you select an empty audio track and press play you should see a better core distribution.


The latest Logic X version (10.2.2) as a new audio preference that enables multi-cores processing on record enable tracks. Put this setting to "playback and live tracks" and you should see better performances.


Plus when using VE, there is a buffer multiplier wich helps even more...

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Master: Imac I7 32Gb Late 2013 - - OsX 10.13.6
Slave: Corei7 6800k 64gb - Win 10
Soft: Logic X 10.4.4 - ProTools 12.x - VE Pro 6 - VI Pro 2 - MIR
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