--- linux-2.6.3/sound/usb/usbmixer_maps.c	2004-02-25 18:22:10.000000000 +0100
+++ linux-2.6.3-usbaudio/sound/usb/usbmixer_maps.c	2004-02-26 21:32:54.000000000 +0100
@@ -86,6 +86,7 @@
 	{ 26, "IEC958 Optical Playback" }, /* OT */
 	{ 27, NULL }, /* DISABLED: EU (for what?) */
 	/* 28: FU speaker (mute) */
+	{ 29, NULL /*"Digital In Playback Source"*/}, /* */
 	{ 0 } /* terminator */
 };