This adds db gain information to M-Audio Fast Track Ultra (8R) devices.
Signed-off-by: Felix Homann <linuxaudio@showlabor.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
                                in  + 1, out + 1);
                        err = snd_create_std_mono_ctl(mixer, id, control,
                                                        cmask, val_type, name,
-                                                       NULL);
+                                                       &snd_usb_mixer_vol_tlv);
                        if (err < 0)
                                return err;
                }
                                in - 7, out + 1);
                        err = snd_create_std_mono_ctl(mixer, id, control,
                                                        cmask, val_type, name,
-                                                       NULL);
+                                                       &snd_usb_mixer_vol_tlv);
                        if (err < 0)
                                return err;
                }