DIVA audio glitches but CPU & Memory fine

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Hey

So I bought DIVA and I can only just about run one instance of it before it glitches and stutters and clicks. It near-crashes the iMac if I have 4+ instances of it.

Why can that be happening? This is a Quad core i7 4.2 ghz machine with 32GB RAM. When I look at my activity monitor the CPU and memory are only 30% used at tops.

Although the Ableton CPU monitor does jump from low numbers, right up to over 100 for split seconds while it's glitching.

I have turned my buffer size to 1024 but still, get the glitches.

I am using the Core Audio driver, with a PreSonus Audiobox USB soundcard.

Oh and DIVA is switched to multicore mode.

Any help? Do any other iMac users have advice? I haven't had the opportunity to try a different DAW, but I may try to install a demo of FL or something and see what happens.

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is it better when you turn off multicore mode?
On some systems multicore works better. On other systems it is better to turn it off

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Try to set your project sample rate to 44.1khz. My Diva doesn’t run great at 96khz in LPX.

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The first thing that comes to mind for me is power saving options interfering with real time audio. In Windows I make sure to disable core parking and frequency scaling, as those are almost guaranteed to cause random audio buffer underruns when it constantly tries to scale up and down for your workload. I don't know how this is set on a Mac.

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Agree with the multi core and power posts.
Ableton is already multithreaded so you should probably turn that off in Diva.
I don’t know much about macs but in windows passive cooling will throttle laptop cpu on heat up - anything comparable there?

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