24bit/192 kHz X-Fi Elite Pro Playback
The Xi-Fi Elite Pro sound card is capable of sampling inputs at up to 24 bit/96 kHz resolution.
However, with 192 kHz D/A converters, playback is supported for digital data at up to 24 bit/192 kHz (although the actual digital
data stream at 192 kHz is not available at the digital output for copyright protection reasons).
To demonstrate this, a simple DVD-Audio test disk was compiled with programatically synthesized
pure sine waves with stereo 24bit/192 kHz sine data. The DVD-Audio disk was played using Creative's DVD-Audio
Player. The line-out response for playback of an
80 kHz sine wave is shown below using a suitable oscilloscope, clearly showing a bandwidth
consistent with about half the digital data sampled rate of 192 kHz (96 kHz). Both channels are shown.
Identical results are obtained if the basic 24bit/192 kHz wav file used to create the
DVD-Audio disk is played back using MediaSource 3.x Player.
For comparison, a 10 kHz sine wave of identical digital amplitude played back using the same DVD-Audio
player configuration is shown. The 80 kHz line-out response is down from the 10 kHz "mid band"
line-out response by about 1.5 dB, i.e. 20log(2.6/3.08)