The base test had all auxiliary features disabled (usb, serial, optical, networking, drag and drop, clipboard sharing and so on).ĭPCs/ISRs would take in the region of 300-500 micro-seconds (idle), with frequent spikes to 5ms (idle), and up to 40-50ms (w/ 200ms peaks!) when under load. I haven't honed into the cause of it, but it looks like it may be a driver DPC/interrupt that is taking too long to process, and thereby slowing down other routines, including audio which is time sensitive. There are some pretty bad interrupt latency issues, which may explain why the audio is popping and crackling.I am running a sandy bridge i5-2500k for your information. Power settings are in high performance mode. The actual CPU clock is 4299MHz, with a x43 multiplier and a bus speed of 100Mhz.
The VM CPU clocks are showing 3000 MHz clocks w/ a x3 multiplier and a bus speed of 1000 MHz.
CPU-Z revealed a clock that is lower than the actual CPU clock. I have been running some debug tools in a Win7 VM, here are a few observations: If you need some more information or some logs, don’t hesitate to tell me. I would tell this is probably the right direction but not the result I hoped for. During all the tests there were no complete disappearance of the sound, where I have to switch it off and on again in the VM toolbar. And there were no problems with pause this time, as I described it in forum. I got the distortion at the beginning of the stream playback, but not in the first 10 minutes of playback. On my Win 10 guest and host the distortion in the small sounds now came not immediately but after 5 or 10 seconds. The stream playback now has growing distortion for 10 seconds not every 90 seconds, but just at the beginning and then after four and a half minutes. On my Win 8 host / Win 7 guest combo I still have distortion on small test sounds. I also repeated the test with the newer guest additions form 5.1.31 (19407), but this didn’t change anything.Ĭomparing to the old state the situation now is little bit better, but not OK. Thank you for releasing a new version (19405), so I could test this once again. I already tested and reported this sound problem in the forum here and here in the past. Logs from current 5.2, 6.0 and 6.1 versions Win10 VBox 5 ahrdening log, no switch, just distortion Win10 VBox 5 log, no switch, just distortion Win10 VBox_5 logs from BT back to speaker Host: Fedora 27, Vbox 5.2.6, Guest: Windows 8, Affected soft: Skype for businessĪll the logs I’ve collected during those three runs. Windows 7 Audio stream test, distortion at 6:35, part 2 Windows 7 Audio stream test, distortion at 6:35, part 1 
Windows 7 Audio stream test, distortion at the beginning
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