Ticket #3999 (closed defect: obsolete)

Opened 9 years ago

Last modified 3 years ago

USB audio is garbled

Reported by: esj Owned by:
Priority: major Component: USB
Version: VirtualBox 2.2.2 Keywords:
Cc: Guest type: Windows
Host type: Linux

Description (last modified by frank) (diff)

I am encountering significant distortion in USB audio both input and output. for USB audio device, I used the VXI B200 microphone and headset.

Fixing this problem is important because it gets in the way of disabled users using a virtual machine for their speech recognition environment. Using speech recognition in a Windows guest virtual machine solves many problems including stability, performance, and multimachine accessibility.


vbox_audio_1.wma Download (162.7 KB) - added by esj 9 years ago.
audio file demonstrating distortion

Change History

Changed 9 years ago by esj

audio file demonstrating distortion

comment:1 Changed 9 years ago by reagle

Yes, VirtualBox has never done USB mics well unless you build a custom kernel. With the 2.* VBoxen and 2.6.* kernels I have to use the following options CONFIG_PREEMPT=y CONFIG_HZ_1000=y CONFIG_HZ=1000 # CONFIG_NO_HZ is not set. Of course, the shared clipboard eventually breaks, which is supposedly fixed in VBox 3.0B1, but it breaks the sound again, even with a custom kernel.

comment:2 Changed 8 years ago by rfkrocktk

I'm also experiencing this problem. How do I modify my kernel options to get this to work? Do I need to be running an RT kernel?

comment:3 Changed 8 years ago by reagle

I'm now running Linux urd 2.6.31-9-rt which came with Kubuntu Karmic (9.10) and it works well.

comment:4 Changed 8 years ago by Ravenman

I have virtualbox_bin 3.1.2 installed on Arch Linux system (kernel (x86_64) + KDE 4.3.4) and I have this issue also with a MS-Windows Xp as guest.

comment:5 Changed 3 years ago by frank

  • Status changed from new to closed
  • Resolution set to obsolete
  • Description modified (diff)
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