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Appendix A: Specifications
306
Bandwidth Requirements
The table below details the audio playback and capture bandwidth
requirements to transport audio under each of the selected formats.
Audio format
Network bandwidth requirement
44.1 KHz, 16bit stereo
176 KB/s
44.1 KHz, 16bit mono
88.2 KB/s
2.05 KHz, 16bit stereo
88.2 KB/s
22.05 KHz, 16bit mono
44.1 KB/s
11.025 KHz, 16bit stereo
44.1 KB/s
11.025 KHz, 16bit mono
Audio 22.05 KB/s
In practice, the bandwidth used when an audio device connects to a
target is higher due to the keyboard and video data consumed when
opening and using an audio application on the target.
A general recommendation is to have at least a 1.5MB connection before
running playback and capture.
However, high video-content, full-color connections using high-target
screen resolutions consume much more bandwidth and impact the
quality of the audio considerably.
To help mitigate quality degeneration, there are a number of
recommended client settings that reduce the impact of video on audio
quality at lower bandwidths:
Connect audio playback at the lower quality formats. The impact of
video consuming bandwidth is much less notable at 11k connections
than at 44k
Set the connection speed under Connection Properties to a value
that best matches the client to server connection
Under Connection Properties, set the color depth to as lowt value as
possible. Reducing the color depth to 8 bit color considerably
reduces the bandwidth consumed
Set Smoothing, to High. This will improve the appearance of the
target video by reducing displayed video noise
Under Video settings, set the Noise Filter to its highest setting of 7
(highest value) so less bandwidth is used for target screen changes