HP Remote Graphics Software (RGS) Uživatelský manuál Strana 257

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C Linux remote audio device support
As shown in Figure 2-24 RGS audio subsystem on Linux on page 38, an audio device is required to be
installed in Linux-based Remote Computers in order for application-generated audio to be sent to the
Local Computer. Furthermore, the audio device installed in the Remote Computer must have the ability
to record from a control that is the mix of all audio signals. On a Windows computer, by way of
comparison, this control is often called “Stereo Mix”. Linux, however, does not follow a standard
naming convention for this control—hence, the need to evaluate individual audio devices to determine
their suitability for use on Linux.
RGS will attempt to capture application generated audio from the Sender and playback the result on
the Receiver. Not all audio device drivers provide the capability to capture application generated
audio.
The following list of audio devices are known to work on Redhat EL4 and Redhat EL5:
SoundBlaster Audigy 4—SB0660
SoundBlaster Audigy 4—SB0610
SoundBlaster Audigy 2ZS—SB0350
SoundBlaster—SB0160
SoundBlaster Live!—CT4780
SoundBlaster Live!—CT4760
HP Personal Workstations have a high definition audio device on the motherboard. This device is
known to use a driver on Redhat EL4 and Redhat EL5 that does not allow RGS to capture application
generated audio.
The Linux virtual audio driver can be used on systems without audio hardware. In some cases, it may
be desirable to disable the physical audio device and install the virtual audio driver. See
Linux Sender
Audio on page 83 for information on how to install the virtual audio driver.
IMPORTANT: The Linux virtual audio driver is the “only” supported audio device for RHEL V6.
Hardware audio devices are not supported.
NOTE: The Linux virtual audio driver is not supported in a virtual machine. Timing information from
the kernel in a virtual machine may not be precise enough to ensure consistent audio quality.
ENWW 239
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