Yamaha UW500 Owner's Manual page 36

Hard Disk Recording
6. On the "Wave Format" page, click the box to display a drop-down list
and select [44.1kHz, Mono, 16Bit]. Click [OK] to close the dialog box.
NOTE
NOTE
7. From the [Setup] menu, select [Record/Playback Settings] and check
the radio button on the left of "Realtime." Click [OK] to close the win-
dow.
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If a stereo effect unit is connected to the UW500 via stereo connection,
select [44.1kHz, Stereo, 16Bit].
XGworks does not allow Wave files with different sampling frequencies to
be played simultaneously.