*** mixer_quirks.c  2011-05-17 22:23:08.000000000 -0400
--- fixed_mixer_quirks.c    2011-05-17 22:27:53.567168118 -0400
***************
*** 61,66 ****
--- 61,67 ----
    { USB_ID(0x041e, 0x3020), 2, 1, 6, 6,  18, 0x0013 }, /* Audigy 2 NX  */
    { USB_ID(0x041e, 0x3040), 2, 2, 6, 6,  2,  0x6e91 }, /* Live! 24-bit */
    { USB_ID(0x041e, 0x3042), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 */
+   { USB_ID(0x041e, 0x30df), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 Pro */
    { USB_ID(0x041e, 0x3048), 2, 2, 6, 6,  2,  0x6e91 }, /* Toshiba SB0500 */
  };

***************
*** 188,193 ****
--- 189,200 ----
                  usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
                  USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
                  !value, 0, NULL, 0, 100);
+   /* USB X-Fi S51 Pro */
+   if (mixer->chip->usb_id == USB_ID(0x041e, 0x30df))
+       err = snd_usb_ctl_msg(mixer->chip->dev,
+                 usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
+                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+                 !value, 0, NULL, 0, 100);
    else
        err = snd_usb_ctl_msg(mixer->chip->dev,
                  usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
***************
*** 234,242 ****
--- 241,253 ----
        /* USB X-Fi S51 doesn't have a CMSS LED */
        if ((mixer->chip->usb_id == USB_ID(0x041e, 0x3042)) && i == 0)
            continue;
+       /* USB X-Fi S51 Pro is the same */
+       if ((mixer->chip->usb_id == USB_ID(0x041e, 0x30df)) && i == 0)
+           continue;
        if (i > 1 && /* Live24ext has 2 LEDs only */
            (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
             mixer->chip->usb_id == USB_ID(0x041e, 0x3042) ||
+            mixer->chip->usb_id == USB_ID(0x041e, 0x30df) ||
             mixer->chip->usb_id == USB_ID(0x041e, 0x3048)))
            break;
        err = snd_ctl_add(mixer->chip->card,
***************
*** 512,517 ****
--- 523,529 ----
    case USB_ID(0x041e, 0x3020):
    case USB_ID(0x041e, 0x3040):
    case USB_ID(0x041e, 0x3042):
+   case USB_ID(0x041e, 0x30df):
    case USB_ID(0x041e, 0x3048):
        err = snd_audigy2nx_controls_create(mixer);
        if (err < 0)