The audio stack in Windows Vista and Windows 7 has been extensively reworked. This has been done to attempt to address problems with low-latency audio needs, among other things. The experience has been largely negative for users, in my experience, due to the low number of audio drivers that actually properly utilize the new model, and the poor performance and artifacts users experience with "compatibility mode", if you want to call it that, devices.
Among other things, DirectSound is, well, no longer direct, and DirectSound3D basically doesn't work (though there may be workarounds, such as intercepting DS3D calls and translating to OpenAL). For a summary of the changes and issues, please see here: http://en.wikipedia.org/wiki/Technical_features_new_to_Windows_Vista#Audio and here: http://en.wikipedia.org/wiki/DirectSound#Windows_Vista You can try a slaving a USB audio device directly to the VM; this may or may not produce better results, depending on the device. Anyone working on fixing the new audio stack support in VirtualBox, though, would be well-served to make sure the reference applications they're using do in fact work properly on real hardware, before they go chasing their tails-- things have changed a lot. All that said, the design of the new model seems sound enough, and it may simply be time to implement a virtual HD Audio device (which is what replaced AC97) and write corresponding drivers. Cheers, Matt Heck President Xeraline, Inc. ----- Start Original Message ----- Sent: Sun, 08 Nov 2009 18:15:19 +0100 From: dick hoogendijk <d...@nagual.nl> To: vbox-users@virtualbox.org Subject: [vbox-users] audio on windows 7 > I have an Intel 82801AA AC'97 Audio Controller in my virtual windows 7 > box, running on OpenSolaris in VirtualBox-3.0.10. The sound is choppy > and distorted. This also happened on VBox-3.0.8 > Windows XP machines run fine. Is this a known issue? > > > _______________________________________________ > vbox-users mailing list > vbox-users@virtualbox.org > http://vbox.innotek.de/mailman/listinfo/vbox-users ----- End Original Message ----- _______________________________________________ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users
