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  • Process Buffer in Logic 10.2.1?

    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


  • last edited
    last edited

    @jobuk55 said:

    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?


  • 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

    Image


  • 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


  • 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


  • 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.