diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index b0ef9f5..7c0d21e 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -408,6 +408,8 @@
 			/* doesn't set the sample rate attribute, but supports it */
 			fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
 			break;
+		case USB_ID(0x0763, 0x2001):  /* M-Audio Quattro USB */
+		case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
 		case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
 		case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
 						an older model 77d:223) */
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 090e193..77762c9 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -369,6 +369,30 @@
 	return 0;
 }
 
+static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
+{
+	int err;
+
+	if (dev->actconfig->desc.bConfigurationValue == 1) {
+		snd_printk(KERN_INFO "usb-audio: "
+			   "Fast Track Pro switching to config #2\n");
+		/* This function has to be available by the usb core module.
+		 * if it is not avialable the boot quirk has to be left out
+		 * and the configuration has to be set by udev or hotplug
+		 * rules
+		 */
+		err = usb_driver_set_configuration(dev, 2);
+		if (err < 0) {
+			snd_printdd("error usb_driver_set_configuration: %d\n",
+				    err);
+			return -ENODEV;
+		}
+	} else
+		snd_printk(KERN_INFO "usb-audio: Fast Track Pro config OK\n");
+
+	return 0;
+}
+
 /*
  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
  * documented in the device's data sheet.
@@ -471,16 +495,49 @@
 /*
  * Setup quirks
  */
-#define AUDIOPHILE_SET			0x01 /* if set, parse device_setup */
-#define AUDIOPHILE_SET_DTS              0x02 /* if set, enable DTS Digital Output */
-#define AUDIOPHILE_SET_96K              0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
-#define AUDIOPHILE_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
-#define AUDIOPHILE_SET_DI		0x10 /* if set, enable Digital Input */
-#define AUDIOPHILE_SET_MASK		0x1F /* bit mask for setup value */
-#define AUDIOPHILE_SET_24B_48K_DI	0x19 /* value for 24bits+48KHz+Digital Input */
-#define AUDIOPHILE_SET_24B_48K_NOTDI	0x09 /* value for 24bits+48KHz+No Digital Input */
-#define AUDIOPHILE_SET_16B_48K_DI	0x11 /* value for 16bits+48KHz+Digital Input */
-#define AUDIOPHILE_SET_16B_48K_NOTDI	0x01 /* value for 16bits+48KHz+No Digital Input */
+#define MAUDIO_SET		0x01 /* parse device_setup */
+#define MAUDIO_SET_COMPATIBLE	0x80 /* use only "win-compatible" interfaces */
+#define MAUDIO_SET_DTS		0x02 /* enable DTS Digital Output */
+#define MAUDIO_SET_96K		0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
+#define MAUDIO_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
+#define MAUDIO_SET_DI		0x10 /* enable Digital Input */
+#define MAUDIO_SET_MASK		0x1f /* bit mask for setup value */
+#define MAUDIO_SET_24B_48K_DI	 0x19 /* 24bits+48KHz+Digital Input */
+#define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48KHz+No Digital Input */
+#define MAUDIO_SET_16B_48K_DI	 0x11 /* 16bits+48KHz+Digital Input */
+#define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48KHz+No Digital Input */
+
+static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
+				      int iface, int altno)
+{
+	/* Reset ALL ifaces to 0 altsetting.
+	 * Call it for every possible altsetting of every interface.
+	 */
+	usb_set_interface(chip->dev, iface, 0);
+	if (chip->setup & MAUDIO_SET) {
+		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
+			if (iface != 1 && iface != 2)
+				return 1; /* skip all interfaces but 1 and 2 */
+		} else {
+			unsigned int mask;
+			if (iface == 1 || iface == 2)
+				return 1; /* skip interfaces 1 and 2 */
+			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
+				return 1; /* skip this altsetting */
+			mask = chip->setup & MAUDIO_SET_MASK;
+			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
+				return 1; /* skip this altsetting */
+			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
+				return 1; /* skip this altsetting */
+			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
+				return 1; /* skip this altsetting */
+		}
+	}
+	snd_printdd(KERN_INFO
+		    "using altsetting %d for interface %d config %d\n",
+		    altno, iface, chip->setup);
+	return 0; /* keep this altsetting */
+}
 
 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
 					 int iface,
@@ -491,30 +548,65 @@
 	 */
 	usb_set_interface(chip->dev, iface, 0);
 
-	if (chip->setup & AUDIOPHILE_SET) {
-		if ((chip->setup & AUDIOPHILE_SET_DTS)
-		    && altno != 6)
+	if (chip->setup & MAUDIO_SET) {
+		unsigned int mask;
+		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
 			return 1; /* skip this altsetting */
-		if ((chip->setup & AUDIOPHILE_SET_96K)
-		    && altno != 1)
+		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
 			return 1; /* skip this altsetting */
-		if ((chip->setup & AUDIOPHILE_SET_MASK) ==
-		    AUDIOPHILE_SET_24B_48K_DI && altno != 2)
+		mask = chip->setup & MAUDIO_SET_MASK;
+		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
 			return 1; /* skip this altsetting */
-		if ((chip->setup & AUDIOPHILE_SET_MASK) ==
-		    AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
+		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
 			return 1; /* skip this altsetting */
-		if ((chip->setup & AUDIOPHILE_SET_MASK) ==
-		    AUDIOPHILE_SET_16B_48K_DI && altno != 4)
+		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
 			return 1; /* skip this altsetting */
-		if ((chip->setup & AUDIOPHILE_SET_MASK) ==
-		    AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
+		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
 			return 1; /* skip this altsetting */
 	}
 
 	return 0; /* keep this altsetting */
 }
 
+
+static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
+					   int iface, int altno)
+{
+	/* Reset ALL ifaces to 0 altsetting.
+	 * Call it for every possible altsetting of every interface.
+	 */
+	usb_set_interface(chip->dev, iface, 0);
+
+	/* possible configuration where both inputs and only one output is
+	 *used is not supported by the current setup
+	 */
+	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
+		if (chip->setup & MAUDIO_SET_96K) {
+			if (altno != 3 && altno != 6)
+				return 1;
+		} else if (chip->setup & MAUDIO_SET_DI) {
+			if (iface == 4)
+				return 1; /* no analog input */
+			if (altno != 2 && altno != 5)
+				return 1; /* enable only altsets 2 and 5 */
+		} else {
+			if (iface == 5)
+				return 1; /* disable digialt input */
+			if (altno != 2 && altno != 5)
+				return 1; /* enalbe only altsets 2 and 5 */
+		}
+	} else {
+		/* keep only 16-Bit mode */
+		if (altno != 1)
+			return 1;
+	}
+
+	snd_printdd(KERN_INFO
+		    "using altsetting %d for interface %d config %d\n",
+		    altno, iface, chip->setup);
+	return 0; /* keep this altsetting */
+}
+
 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
 				  int iface,
 				  int altno)
@@ -522,6 +614,12 @@
 	/* audiophile usb: skip altsets incompatible with device_setup */
 	if (chip->usb_id == USB_ID(0x0763, 0x2003))
 		return audiophile_skip_setting_quirk(chip, iface, altno);
+	/* quattro usb: skip altsets incompatible with device_setup */
+	if (chip->usb_id == USB_ID(0x0763, 0x2001))
+		return quattro_skip_setting_quirk(chip, iface, altno);
+	/* fasttrackpro usb: skip altsets incompatible with device_setup */
+	if (chip->usb_id == USB_ID(0x0763, 0x2012))
+		return fasttrackpro_skip_setting_quirk(chip, iface, altno);
 
 	return 0;
 }
@@ -560,6 +658,8 @@
 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
 		return snd_usb_nativeinstruments_boot_quirk(dev);
+	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
+		return snd_usb_fasttrackpro_boot_quirk(dev);
 	}
 
 	return 0;
@@ -570,15 +670,24 @@
  */
 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
 {
+	/* it depends on altsetting wether the device is big-endian or not */
 	switch (chip->usb_id) {
 	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
-		if (fp->endpoint & USB_DIR_IN)
+		if (fp->altsetting == 2 || fp->altsetting == 3 ||
+			fp->altsetting == 5 || fp->altsetting == 6)
 			return 1;
 		break;
 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
 		if (chip->setup == 0x00 ||
-		    fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
+			fp->altsetting == 1 || fp->altsetting == 2 ||
+			fp->altsetting == 3)
 			return 1;
+		break;
+	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
+		if (fp->altsetting == 2 || fp->altsetting == 3 ||
+			fp->altsetting == 5 || fp->altsetting == 6)
+			return 1;
+		break;
 	}
 	return 0;
 }