DSD upsampling...I'm not sure I'm seeing the right thing...[Resolved]

Roon Software Discussion
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I’m hoping there is a way to tell how many cores and threads are being used. v1.3 Build 218

I just upgraded my i5-6500 CPU to an i7-7700, but dsd upsampling has not taken a significant jump…at DSD256 I’m getting processing speeds of 1.5 and DSD512 it’s dropping to 1.0. I was hoping for a little more relief from the upgrade.

OS is win10pro 64 bit. 16gb ram. Ssd of course. Nothing else running - machine is headless. i5 was 3.2GHz, i7 is 3.6GHz

IMG_7763.JPG4032×3024 2.56 MB

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Currently, (and I might be wrong), I think Roon only uses 1 core to process DSP.

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Yep, Roon uses 1 core only for upsampling. The main difference between an i7 and i5 processor is Hyper Threading. I7 processors are mainly faster on repetetive tasks and multithread task. Upsampling is a serial task, not repetetive nor multithreated so for this task there is not much of a difference between the two.

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Did you check Parallelize Sigma-Delta in Sample Rate Conversion settings?
In linux I have only 16% cpu distributed to all cores for DSD512 and processing speed > 2.0

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And also set CPU governor to performance.

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As @brian very kindly mentioned to me thats was my issue…as I had Custom set in the DSP Sample Rate Conversion settings so it was scrolled off the bottom of the settings window and I had missed that. All good now. Removed custom setting now too.

ADDED…the image was from Brian to explain the setting the enclosed box…it was for the benefit of others who might have an issue like mine. It is not my setting.

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By looking at your screenshot it seems you are upsampling to “Max PCM Rate”, or to be correct, not upsampling at all :slight_smile: (“Disabled”)
None of the SDM, Sigma-Delta Modulator or Native DSD Processing settings should have any effect when you are playing back PCM material. You do seem to have both convolution , procedural EQ and headroom mgmt Active though.

What kind of processing speed do you see when playing back a redbook file? And what sample rate is “Max PCM”?

I only use Sample Rate Conversion with the same settings as your screenshot display, but upsampling to DSD128 and i am getting a Processing Speed of around 6.5x.
(Intel I3 3220 on my QNAP NAS where Roon resides)

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@Mikael_Ollars the image was from Brian to explain the setting the enclosed box…it was for the benefit of others who might have an issue like mine. :stuck_out_tongue: Noted my post now.

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