This error occurs more frequently on 2.2.X kernels. Products requiring this feature may or may not install, and may or may not run after installation. Each operating system expects that it has exclusive control of the sound hardware. Thus, the volume level displayed in the guest may not reflect reality if the host or another guest operating system changes the volume. For instance, on Linux, try xmixer -poll .
Sound is sensitive to system load.
Shutting down or pausing other applications may help. At this time, we have not identified a workaround to the problems in the driver. We have contacted Creative Labs to resolve this issue. Workstation virtual machines do not support MIDI devices or game ports. Sound may play erratically under heavy system loads.