Support Of Sound Recording Devices On Microsoft Windows Xp Professional - HP Xw460c - ProLiant - Blade Workstation User Manual

2-17-3 Support of sound recording devices on Microsoft Windows XP
Professional
NOTE: The Windows Sounds and Audio Devices Properties dialog allows the user to select the "sound recording
device". For simplicity, "microphone" is used below instead of "sound recording device". Remote microphone is not
supported on Microsoft Windows Vista.
Prior to RGS 5.2.0, a Receiver-attached USB microphone couldn't be remotely connected to the Sender in the
same manner as other remote USB devices (see Section 2-16,
attached USB microphone would need to be first processed by the Windows USB audio driver on the Receiver.
The audio would then be sent to the RGS Audio Recorder (see Figure 2-22) for capture and transmission to the
Sender.
In order for a USB microphone to be used in this manner, USB devices are Local must be selected in the Remote
USB Configuration dialog during installation. This ensures the USB microphone is a local device, allowing its
audio to be captured by the RGS Audio Recorder. This capability allows use of any USB microphone supported
by Windows.
At RGS 5.2.0, the Remote USB driver (on the Local Computer) has been enhanced to support the USB isochronous
data type, which is commonly used for streaming data such as that generated by audio and video devices. This
enables certain isochronous USB microphones to be accessed directly by the Remote Computer in the same
manner as other USB devices. See Appendix B for a list of supported USB microphones (listed under Sound
recording devices).
To remotely attach USB microphones to the Remote Computer, either of these Remote USB Configuration settings
can be selected:
USB devices are Remote
•
USB devices are Local/Remote
•
If USB devices are Remote is selected, a USB microphone can be accessed anytime by the Remote Computer. If USB devices are Local/Remote is selected, how the USB
microphone can be accessed by the Remote Computer depends on when the microphone is connected to the Local Computer relative to establishment of the RGS
connection. If the microphone is connected to the Local Computer prior to establishment of the RGS connection, the microphone will be a local device only, and will be
accessible by the Remote Computer only via the Receiver RGS Audio Recorder. If the microphone is connected to the Local Computer after RGS connection establishment,
the microphone will be a remote device only, and can be accessed directly by the Remote Computer.
Figure 2-19 shows these two cases.
HP recommends using the audio access method introduced at RGS 5.2.0, whereby the Remote Computer can
directly access the USB microphone, for the following reasons:
The pre-RGS 5.2.0 audio access method continuously records and transmits audio independent of whether
•
the application on the Remote Computer is requesting audio input. This can consume network bandwidth,
especially when the level of background noise at the microphone is above the audio threshold used to detect
valid audio.
The RGS 5.2.0 audio access method allows audio parameters to be set by audio controls on the Remote
•
Computer alone. The pre-RGS 5.2.0 audio access method requires setting audio parameters on both the
Remote Computer and Local Computer.
"Remote USB overview"). Audio from a Receiver-
RGS overview 40