Esoteric SA-50 Manual Del Usuario página 19

If the sound does not playback normally when you are using a
supported operating system, and the connections are correct as
described above, check the following points.
For Windows XP
If the drivers were correctly installed, "USB Composite Device"
appears under "Universal Serial Bus controllers" in "Device Manager".
Furthermore, "USB Audio Device" appears under "Sound, video and
game controllers" in "Device Manager".
If these do not appear, repeat steps
again.
< Click "Control Panel" and then "Sound and Audio Devices Properties".
Click the "Audio" tab. Check that "Default device" under "Sound
playback" is "USB Audio DAC".
to to install the drivers
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For Windows Vista
Click "Control Panel" and then "Sound". Click the "Playback" tab and
check that "Speakers USB Audio DAC" is selected.
< Furthermore, clicking "Properties" at this window displays the
following window. The audio sample rate and bit depth can be set
here.
For better sound quality, select "16 bit, 44100 Hz (CD quality)" or
"16 bit, 48000 Hz (DVD quality)". When playing data recorded from
a CD, "16 bit, 44100 Hz (CD quality)" is recommended.
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