>you can choose to use either the advanced or OS-standard driver, via the ADV switch<
you might have to turn that off or switch it to the off position
from the manual....
21.ADVANCE (mode select) switch[/color][/font]This switches the driver operation mode.[/color][/font]If you change the setting of this switch, you must close all software, disconnect the [/color][/font]USB cable that connects the UA-25 to your computer, and then re-connect the USB [/color][/font]cable.[/color][/font]On (Advanced mode)[/color][/font]You can use the included UA-25 driver to record, play, and edit audio from your [/color][/font]sequencer software or audio editing software with high quality and stable [/color][/font]timing.[/color][/font]Off (Standard driver mode)[/color][/font]Choose this mode if you are using software that uses the standard audio driver [/color][/font]included with your operating system.[/color][/font]* The sample rate will be fixed at 44.1 kHz/16 bit regardless of the setting of the UA-25’s sample [/color][/font]rate select switch.[/color][/font]* The MIDI IN/OUT connectors are not available when using Standard driver mode.[/color][/font]For details on these operating modes, refer to [/color][/font]“About the driver modes”[/color][/font](Windows, p. 14; Macintosh, p. 32).[/color][/font]