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Process Buffer in Logic 10.2.1?
Last post Thu, Feb 18 2016 by snattack, 6 replies.
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Posted on Fri, Jan 22 2016 11:36
by jobuk55
Joined on Mon, Jan 19 2015, London, Posts 16

Hello,

I've been using VE Pro with Logic X in the past with a small process buffer as advised by the community on here so i don't run into many difficulties.

My question is, now that 10.2.1 is released with a key multithreading feature, is it reccomended/neccesary to change the process buffer to normal or large?

Many thanks

Posted on Fri, Jan 22 2016 16:45
by Paul Cristo
Joined on Wed, Jan 27 2010, Posts 22

Originally Posted by: jobuk55 Go to Quoted Post

Hello,

I've been using VE Pro with Logic X in the past with a small process buffer as advised by the community on here so i don't run into many difficulties.

My question is, now that 10.2.1 is released with a key multithreading feature, is it reccomended/neccesary to change the process buffer to normal or large?

Many thanks

I would recommend you run your sytem as-is until you start to have issues.  There isn't a lot of information available on what exactly the new multi-threading feature does or how it works.  I haven't come across any performance bumps yet, although I haven't really gotten to experiment with it.

Anyone else see any differences since the update?

Mac Pro 4,1 2.26GHz 8-core - 32GB RAM - SSDs only - Mac OS 10.10.5

Logic 10.2.1 - Vienna Ensemble Pro 5 - installed locally
Kontakt 5
Posted on Sat, Jan 23 2016 02:19
by C.B.
Joined on Wed, Aug 11 2010, Quebec Canada, Posts 114

Hi,

The main difference is that the load is now shared between CPU cores. Before the upgrade, only one core of my iMac i7 was used (usage on that project: near 100%). I removed every I/O plugin instances (about 115). Now all cores (8) are used and the load is very low (5-10%). See screen capture (Logic is playing).

In this project 20 instruments are already playing midi notes (about 40 instruments when the project will be more advanced).

My setup: Logic on iMac with 116 instruments/tracks ready to use (3 VEP instances, each with 48 ports/midi inputs) on a slave (MacPro). Each track is using AM Pro Kit for Scripter plugin (articulation switching on automation with visual; see clarinet track on screen capture). 

Best,

Claude

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C.B.
Posted on Sat, Jan 23 2016 02:36
by jobuk55
Joined on Mon, Jan 19 2015, London, Posts 16

Thanks for that Claude,

I notice that you're using the event input and I suppose this ties in as well with the changes. 

When I set everything up last year, I experimented with using the event input but the one core thing seemed to make performance suffer so I just ended up using multi-output channels as the AU plugin in Logic connected to Multitimbrel instances in the slaves.

That was of course before these changes to Logic 10.2.1

Now I wonder if I should reconsider using the Event Input solution instead.

Would appreciate your thoughts.

Thanks,

Joe

Posted on Sat, Jan 23 2016 03:14
by C.B.
Joined on Wed, Aug 11 2010, Quebec Canada, Posts 114

Hello Joe,

As I'm using a slave for VEP and VIP, I chose the VSL Event Input plugin approach. The load was high, but manageable.

I made a mistake in my previous post. I didn't realized that 2 of my 3 VEP instances weren't working without I/O plugin instances... I don't know why. I suppose VSL programmers are working on this.

The consequence is that only 4 cores are used now. So the load is about 20-25% with some short incursions in the 40-60% range.

Claude

C.B.
Posted on Thu, Feb 18 2016 08:56
by snattack
Joined on Fri, Oct 03 2008, Stockholm, Posts 67

I've upgraded. The CPU distribution is indeed better, but the Script plugin has a bug where it suddenly hogs the CPU during any use, which requires restart of Logic.

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