diff -u -r alsa-kernel/usb/usbquirks.h b/usb/usbquirks.h
--- alsa-kernel/usb/usbquirks.h	2008-07-08 21:35:42.000000000 +0800
+++ b/usb/usbquirks.h	2008-07-09 20:45:20.000000000 +0800
@@ -210,6 +210,7 @@
 YAMAHA_DEVICE(0x1043, NULL),
 YAMAHA_DEVICE(0x1044, NULL),
 YAMAHA_DEVICE(0x1045, NULL),
+YAMAHA_DEVICE(0x104E, "KX49"),
 YAMAHA_DEVICE(0x2000, "DGP-7"),
 YAMAHA_DEVICE(0x2001, "DGP-5"),
 YAMAHA_DEVICE(0x2002, NULL),