DSP issue running two thunderbolt Satellites

Thelem

New Member
I upgraded my Mac computer a week ago and I’ve noticed an issue with my setup after all these years. I’ve been running two Uad satellites for around 8 years, a octo core and a quad core.

I got everything setup on the new computer and everything was working good. I opened my latest project in Logic Pro, the project is nearly complete, so my satellites are nearly maxed out dsp wise. When I opened the project I forgot power up the quad core satellite, to my surprise the project still opened with just the octo (I assumed it would give the message about dsp load limit). The project worked and played and I noticed the dsp was at 90% with just the octo running. I then powered up the quad core and restarted the project. To my surprise the with both quad and octo running the project was at 85% dsp limit, only 5% less than when I just had the octo running. I was confused and thought that can’t be right. I then tested again, surely enough just the octo was at 90% while both running was 85% dsp limit.

I then tried giving the quad its own slot, instead of daisy chaining them together. It was still giving me the same dsp results. This means the whole time I’ve been running both units, I feel like I’ve never had the full dsp potential. How come when running both units I’m only getting an extra 5% dsp? Seems like I wasted money buying and running two, as it’s only giving me an extra couple pluggins with the 5% difference.

Does anyone know what could be going on and why this is? I feel like an idiot not noticing this before, I’ve always just ran both at the same time. I’m assuming running an extra quad core on top of the octo should give me more than 5% dsp extra, maybe I’m wrong and don’t know how it all works technically.

Thanks so much everyone, any help or answers is much appreciated!
 

LesBrown

Hall of Fame Member
I’m assuming running an extra quad core on top of the octo should give me more than 5% dsp extra
Yes, the quad provides 50% more DSP: 4 cores is 1/2 of 8 cores, so adding 4 to 8 is adding 50% more.

DSP use isn't always as straightforward as what the DSP meter reads. If you are pressed for DSP, you might find it better to refer to the chart of plugins and actual DSP use, "UAD Instance & Latency Chart," linked from the top of this page under Resources. See this article for more details:


Forgot to ask: Do you have an Apollo attached while you mix? There is DSP there, too.
 

Thelem

New Member
Yes, the quad provides 50% more DSP: 4 cores is 1/2 of 8 cores, so adding 4 to 8 is adding 50% more.

DSP use isn't always as straightforward as what the DSP meter reads. If you are pressed for DSP, you might find it better to refer to the chart of plugins and actual DSP use, "UAD Instance & Latency Chart," linked from the top of this page under Resources. See this article for more details:


Forgot to ask: Do you have an Apollo attached while you mix? There is DSP there, too.
Thank you so much for the quick response, Im also using Apollo Twin duo. The issue I'm having is it looks like when I'm using both of my satellites, it seems like I'm not getting the whole extra 50% power from the quad. When the quad is running alongside the octo I only seem to be able to run an extra couple plug-ins, which is confusing me. For example, with this current project, just using the octo core the project is at 90% dsp, if I then run the quad core alongside it and re-open, I can run 4 instances of the Oto Biscuit distortion and then it's maxed out. (just used that specific plugin as a test). However, if I open a blank project and just run the quad core on its own, I can run 11 instances of the Oto Biscuit distortion. I'm confused to why I'm not getting that much dsp when I run both the Octo and Quad at the same time. Maybe I'm not understanding the dsp allocation of the plugins correctly. I can still make it work like I've done in the past with bouncing channels etc, I'm just confused overall how it seems like there's less available when both units are running together. Appreciate the help!
 
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