User guide

188 Parallels Desktop for Mac User Guide
 To start the guest OS with the sound device activated, select the Activate at startup check
box.
Emulation:
 The Output Device field contains a list with the Default Audio and Null Device
items. It is recommended to choose the Default Audio. Null Device is the choice
for situations when the sound card is required by one of the guest OS applications, but you
want to mute the sound.
 For Input Device we recommend that you select the Default Audio option. Null
Device is the choice for situations when you want to mute sound while the sound card is
required by the guest OS'es applications.
Note. If you are not satisfied with the quality of the sound produced, a special AC'97 sound
driver (page 85) is available for Windows 95/98/ME/NT/2000 guest OSes and for OS/2 and
eComStation guest OSes. You can install it instead of the standard one.
USB Options
The USB Options tab of Configuration Editor allows you to specify whether USB devices will
be connected to the virtual machine automatically or not.
Note. Configuration Editor is available only when the virtual machine is stopped.