On 03/02/2017 19:53, Tmplt wrote:
I saw on an older thread here that passing a USB controller through and using a USB soundcard through it solved that users audio issues. I tried that myself by adding<hostdev mode='subsystem' type='pci' managed='no'> <source> <address domain='0x0000' bus='0x00' slot='0x14' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </hostdev> to the .xml-file, but I can still hear frequent audio stutters akin to my quoted thread. Am I passing the controller incorrectly? The device I'm trying to play through is a FiiO e10k DAC which works without issue on the host and on bare-metal Windows 8.1.
More likely your Windows guest is suffering from large latency, since most USB DACs have small buffers and require (relatively) precise timing of audio stream sent from the USB port. You can check this by comparing http://www.thesycon.de/eng/latency_check.shtml and http://www.resplendence.com/latencymon when running on guest vs. bare metal .
If you are running nvidia card, then disabling PowerMizer might help , see this thread https://www.native-instruments.com/forum/threads/solved-dropouts-cracks-pops-on-windows-7-and-nvidia-gfx-card.126080/
You may also want to disable hypervisor CPU policy, as documented by Alex here http://vfio.blogspot.co.uk/2016/10/how-to-improve-performance-in-windows-7.html . This setting worked on my Windows 10 guest to significantly reduce its latency, its applicability is obviously not limited to Windows 7 only
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