• April 6, 2019 at 08:34 #5776
    huub
    Participant

    Hi, interesting:
    I have a new 15″ macbook running mojave.
    Since 10.14.4 usb audio (rme madiface usb) behaves fine, however; I’m testing now before I take my rig live.
    With a 4 tracks and some plug ins my dsp stays low and quite stable.
    with a track or 10 more, dsp stays low and stable, but I’m getting tiny dropouts with corresponding red lines “dropouts reported by audio interface”..
    This is not a live profcessor issue obviously, but what exactly is lp reporting here, and can anyone make sense of this usb audio behaviour?

    Thanks

    Huub

    May 6, 2019 at 02:31 #5803
    huub
    Participant

    Okay, for my 2019 macbook pro 15″, with “use more threads” unticked (so without the box turned green) I get no more dropouts reported by sound device it seems!
    Even with very low buffer size and lots of plug ins.

    Yay

    Huub

    • This reply was modified 2 weeks, 2 days ago by huub.
    May 6, 2019 at 03:56 #5805
    huub
    Participant

    Oh, and it does not matter for me whether I use the caldigit (thunderbolt3-pci usb) or a random USB c- USB adapter.
    Both work fine.

    Some extra info for future googlers:)

    Huub

    May 14, 2019 at 08:46 #5806
    andia
    Participant

    Hi,

    I also notice some red lines (dropouts reported by audio interface). I also notice that there are more frequent dropouts when there are plugin windows open on the display. when all the plugin guis are closed, there are far less to none of the dropouts. Also varies with different plugins.
    I’m using live professor on hackintosh together with a rme digiface dante and a uad2 quad pcie card. As I had to build it really small (1HE Server case) for live use, there is no more space for a dedicated graphics card.
    Could it be a graphics issue, maybe the onboard graphics card causing this?

    thanks, andi

    May 14, 2019 at 09:49 #5807
    huub
    Participant

    I have found that can be various causes for the red spikes;

    In my case:
    -having “use more threads” selected
    -some specific plug ins cause this (like Harrison Ava de esser)
    -going over the yellow line of “live professor cpu”
    -recalling preset in certain plug ins.

    So it’s never fast or easy to make your system run flawlessly 🙂

    Huub

    May 15, 2019 at 15:25 #5808
    Nikolai
    Keymaster

    Hi

    Yes, this can be a bit confusing. First I can explain what the “More threads option” does: A “thread” is a sperate “task” that the processor can work on.
    When the option is on, the audio processing is split up into multiple tasks to let them be processed by different CPU-cores at the same time.

    In theory, and intuitively, this should make the processing go faster since more cores are working on the same problem.

    but (especially on OSX) tests have shown that when you push latency down this might not be the case. Also, some plugins create their own threads, and it all gets a bit unpredictable, and we don’t like that.

    So bottom line, you have to do like you did. Test what works best with the option on or off. it depends on the system/setup as a whole.

     

    May 15, 2019 at 15:25 #5809
    Nikolai
    Keymaster

    Hi

    Yes, this can be a bit confusing. First I can explain what the “More threads option” does: A “thread” is a sperate “task” that the processor can work on.
    When the option is on, the audio processing is split up into multiple tasks to let them be processed by different CPU-cores at the same time.

    In theory, and intuitively, this should make the processing go faster since more cores are working on the same problem.

    but (especially on OSX) tests have shown that when you push latency down this might not be the case. Also, some plugins create their own threads, and it all gets a bit unpredictable, and we don’t like that.

    So bottom line, you have to do like you did. Test what works best with the option on or off. it depends on the system/setup as a whole.

     

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