VirtualBox

Ticket #7735 (new defect)

Opened 3 years ago

Last modified 3 months ago

Poor sound quality with Windows 7 - too small buffers?

Reported by: astrand Owned by:
Priority: major Component: audio
Version: VirtualBox 3.2.10 Keywords:
Cc: astrand@… Guest type: Windows
Host type: Linux

Description

Basic setup: Linux as host, Windows 7 as guest, AC97 driver and PulseAudio backend. This setup seems to be very sensitive to timing issue. It doesn't take much to get a very "choppy" sound output. This is my test case:

  • Enable PulseAudio TCP support (using paprefs)
  • export PULSE_SERVER=localhost:4714
  • ssh -L4714:localhost:4713 localhost -fN
  • Run VirtualBox, activate PulseAudio audio backend. Boot Windows 7.

On one machine, this *almost* produces OK audio output. You can clearly hear glitches, though, and starting, say, Windows Update makes the quality worse. This is a Dell E6400 laptop.

On another machine (Dell Optiplex 760), the glitches are even more common; you can barely hear the lyrics.

Both machines are running 64-bit Fedora 14. Windows 7 instance is 32-bit.

Change History

comment:1 Changed 3 years ago by astrand

Same problem with 3.1.6.

comment:2 Changed 3 years ago by matteosistisette

This seems like a duplicate of 6816, which is still an issue in 4.0.12

comment:3 Changed 3 months ago by quickbooks

Host Fedora 20 - Gnome Desktop.

When watching Netflix on Windows 8.1 in Internet Explorer, the sound is static sometimes, or the sound breaks, or choppy / jittery.

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