XPS 13 9350 - USB DAC - severely distorted Audio

Hi all

I'm playing a DAC USB files DXD (352.8 kHz FLAC) and I'm getting intermittent severe distortions which, to me, looks like a problem of USB transmission caused by the DPC latency. My configuration is:

-Earn 10 Pro
-jRiver MC21
-Mojo chord connected via USB using rope ASIO driver 1.05
-Alternatively AudioQuest Dragonfly 2 (downsampling to 88.2 kHz samplerate)

I get distortion with the two DACS, which suggests a problem with the XPS 13 HW or SW. I disabled "Allow the computer to turn off this device to save power" for USB3 Intel eXtensible Host Controller and USB (xHCI) root hub, but that has not solved the problem.

Power management is set to high performance, under Advanced settings, I put USB selective suspend setting to disabled.

Check for latency DPC and latency LUNS do show any question and a list of the PC as being capable of streaming audio in real time.

The problem disappears if I chose in jRiver direct sound driver. It occurs the same if I chose the ASIO, the WASAPI and core drivers streaming.

The problem does not occur on a HP zbook 15u.

Someone else has a similar problem and no matter who solved?

I don't know if you've ever thought about it or went nuts perhaps, but I had the same problem and have found a workaround. I have a XPS15 9550 and had the same problem with the Mojo. I bypassed by disabling C-States (the processor sleep state) in the BIOS. This will reduce the battery life to a certain extent, but now the DAC works without a hitch.

Tags: Dell Laptop

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