In device manager, it should be seen as "USB audio device" too !

Can be you find 2 of these devices and dot know which is the PC3.

From "Sonic Matter" in the attachment, you´ll find a .inf file (PC3 USB driver update renaming the entry to "PC3")

Description
Under Windows XP (maybe also on Windows Vista), USBMIDI devices appear as generic "USB Audio Device" to
the software. So if you have two or more it can become annoying trying to figure which USB MIDI leads to what
hardware device.
Solution is to apply a customized .INF file as an driver update to the "USB Audio Device". A such file is provided
here for the PC3. It is a based on a similar file provided by another manufacturer for their hardware. I'vebasically
only modified the manufacturer and product identifiers.
Steps to update the driver:
Control Panel -> Sound and Audio Devices -> Hardware - > USB Audio Device (if you have multiple, make sure to
plug only one at a time) -> Properties -> Driver ->
Update Driver -> No, Not this time -> Install from
a specific location -> Don't Search, I will choose
the driver to install -> Have disk - > Browse ->
Navigate to Kurzweil-PC3.inf -> Ok, select Kurzweil
PC3 from the hardware list and press Next ->
Continue Anyway (any home-made drivers will always be unsigned). Should work now.

I use it for my PC361.

Maybe it works for PC3K too.

hope it helps ...

D.C.

Thanks...
I install the driver but it don't works for me......