Im curious as to what is going on. We work pretty hard to be nice to your CPU, but 3 big things impact it:
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audio analysis. you can turn if off: settings -> setup -> audio analysis speed -> off), it may help a bit. “normal” should only use 5-10% of your CPU. “fast” uses a ton more.
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downsampling. Our downsampler, made by Meridian, is on the cutting edge of DSP technology, and arguably one of the best in the business. It requires a bit more horse power than other solutions out there, but the sound quality is awesome. You can see if it is being activated in the signal path popup… it only should be there if you are requiring a downsampling.
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importing. If you have a spinning circle in the upper right of your Roon window, next to bookmarks, you can click on it and see what’s going on. The import procedure is usually limited by the I/O capabilities of your hard drive, but if you have a fast SSD that can keep up, we will use more CPU. Once importing has slowed, you shouldn’t be using a lot of CPU.
Can you investigate these 3 items and see if any of this applies?