Asus XONAR - Sound Card - 192 kHz User Manual page 45

What are the most important benefits of the Xonar Xense for musicians?
Ultimate Fidelity: Xonar Xense has the highest quality of audio in/out for
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the cleanest sound production.
Duplex HD: Supports audio sampling rates up to 24bit/192KHz for all
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inputs and outputs.
ASIO 2.0: Xonar Xense includes an ASIO 2.0 driver for low-latency, low-
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distortion music creation application.
Will PCM sound output through S/PDIF be just 2 channels even with different
analog output channels?
The S/PDIF protocol specification (IEC-60958) only carries the 2-channel PCM
data or non-PCM AC3/DTS data. Hence, when you select PCM output for S/PDIF,
the Xonar sound card always deliver a 2-channel PCM data through the S/PDIF
output port. For attaining 5.1 channel surround sounds, you can select Dolby
Digital Live encoding output from the S/PDIF out menu, which allows the Xonar
Xense to deliver 5.1 surround sound for DVD movies, and even stereo music.
When I selected "Digital Output device" as the default audio playback device
on Windows Vista, the sound effects and UI controls do not work.
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For Xonar sound cards on Windows
Speakers and Digital Out Device such as S/PDIF.
Speakers is the default device. Use this device to fully control the sound effects on
the Xonar Audio Center, the driver's GUI.
Digital Out Device is designed as a pass-through audio path to play stereo Hi-
Fidelity audio content or encoded audio formats such as Dolby Digital and DTS
Digital Surround bit-stream from DVD or Blu-ray disc titles. The driver does not
process all the audio data that passes through this digital device.
In most software DVD players' audio settings, you could choose "Use S/PDIF
output" or "HDMI" for HDMI output, such as on HDAV1.3. The player then passes
the audio through the "Digital Output Device" automatically. Some devices require
onboard audio to be disabled first. In this case, you do not even need to change
the system default audio device. In most scenarios, we suggest that you keep the
settings in "Speakers" to enjoy the complete features of the Xonar sound card. You
could actually still get LPCM audio data monitoring from S/PDIF-Out port as analog
Front channel output in this situation.
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Vista, there are usually two audio devices:
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ASUS Xonar Xense