diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig
index 4f0eac9bff1e..523aec188ccf 100644
--- a/sound/usb/Kconfig
+++ b/sound/usb/Kconfig
@@ -48,7 +48,10 @@ config SND_USB_CAIAQ
 	    * Native Instruments Kore Controller
 	    * Native Instruments Kore Controller 2
 	    * Native Instruments Audio Kontrol 1
+	    * Native Instruments Audio 4 DJ
 	    * Native Instruments Audio 8 DJ
+	    * Native Instruments Guitar Rig Session I/O
+	    * Native Instruments Guitar Rig mobile
 
 	   To compile this driver as a module, choose M here: the module
 	   will be called snd-usb-caiaq.
diff --git a/sound/usb/caiaq/caiaq-audio.c b/sound/usb/caiaq/caiaq-audio.c
index b3a603325835..08d51e0c9fea 100644
--- a/sound/usb/caiaq/caiaq-audio.c
+++ b/sound/usb/caiaq/caiaq-audio.c
@@ -114,6 +114,7 @@ static int stream_start(struct snd_usb_caiaqdev *dev)
 	dev->output_panic = 0;
 	dev->first_packet = 1;
 	dev->streaming = 1;
+	dev->warned = 0;
 
 	for (i = 0; i < N_URBS; i++) {
 		ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
@@ -376,6 +377,9 @@ static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
 
 		for (stream = 0; stream < dev->n_streams; stream++, i++) {
 			sub = dev->sub_capture[stream];
+			if (dev->input_panic)
+				usb_buf[i] = 0;
+
 			if (sub) {
 				struct snd_pcm_runtime *rt = sub->runtime;
 				char *audio_buf = rt->dma_area;
@@ -397,6 +401,9 @@ static void read_in_urb(struct snd_usb_caiaqdev *dev,
 	if (!dev->streaming)
 		return;
 
+	if (iso->actual_length < dev->bpp)
+		return;
+
 	switch (dev->spec.data_alignment) {
 	case 0:
 		read_in_urb_mode0(dev, urb, iso);
@@ -406,10 +413,11 @@ static void read_in_urb(struct snd_usb_caiaqdev *dev,
 		break;
 	}
 
-	if (dev->input_panic || dev->output_panic) {
+	if ((dev->input_panic || dev->output_panic) && !dev->warned) {
 		debug("streaming error detected %s %s\n", 
 				dev->input_panic ? "(input)" : "",
 				dev->output_panic ? "(output)" : "");
+		dev->warned = 1;
 	}
 }
 
@@ -638,9 +646,10 @@ int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
 	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
 	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
 	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
-		dev->samplerates |= SNDRV_PCM_RATE_88200;
+	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
 		dev->samplerates |= SNDRV_PCM_RATE_192000;
-		break;
+		/* fall thru */
+	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
 	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
 		dev->samplerates |= SNDRV_PCM_RATE_88200;
 		break;
diff --git a/sound/usb/caiaq/caiaq-control.c b/sound/usb/caiaq/caiaq-control.c
index ccd763dd7167..e92c2bbf4fe9 100644
--- a/sound/usb/caiaq/caiaq-control.c
+++ b/sound/usb/caiaq/caiaq-control.c
@@ -39,12 +39,12 @@ static int control_info(struct snd_kcontrol *kcontrol,
 	struct snd_usb_caiaqdev *dev = caiaqdev(chip->card);
 	int pos = kcontrol->private_value;
 	int is_intval = pos & CNT_INTVAL;
+	unsigned int id = dev->chip.usb_id;
 
 	uinfo->count = 1;
 	pos &= ~CNT_INTVAL;
 
-	if (dev->chip.usb_id ==
-		USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ)
+	if (id == USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ)
 		&& (pos == 0)) {
 		/* current input mode of A8DJ */
 		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
@@ -53,6 +53,15 @@ static int control_info(struct snd_kcontrol *kcontrol,
 		return 0;
 	}
 
+	if (id == USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ)
+		&& (pos == 0)) {
+		/* current input mode of A4DJ */
+		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+		uinfo->value.integer.min = 0;
+		uinfo->value.integer.max = 1;
+		return 0;
+	}
+
 	if (is_intval) {
 		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 		uinfo->value.integer.min = 0;
@@ -73,6 +82,14 @@ static int control_get(struct snd_kcontrol *kcontrol,
 	struct snd_usb_caiaqdev *dev = caiaqdev(chip->card);
 	int pos = kcontrol->private_value;
 
+	if (dev->chip.usb_id ==
+		USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ)) {
+		/* A4DJ has only one control */
+		/* do not expose hardware input mode 0 */
+		ucontrol->value.integer.value[0] = dev->control_state[0] - 1;
+		return 0;
+	}
+
 	if (pos & CNT_INTVAL)
 		ucontrol->value.integer.value[0]
 			= dev->control_state[pos & ~CNT_INTVAL];
@@ -90,10 +107,20 @@ static int control_put(struct snd_kcontrol *kcontrol,
 	struct snd_usb_caiaqdev *dev = caiaqdev(chip->card);
 	int pos = kcontrol->private_value;
 
+	if (dev->chip.usb_id ==
+		USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ)) {
+		/* A4DJ has only one control */
+		/* do not expose hardware input mode 0 */
+		dev->control_state[0] = ucontrol->value.integer.value[0] + 1;
+		snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO,
+				dev->control_state, sizeof(dev->control_state));
+		return 1;
+	}
+
 	if (pos & CNT_INTVAL) {
 		dev->control_state[pos & ~CNT_INTVAL]
 			= ucontrol->value.integer.value[0];
-		snd_usb_caiaq_send_command(dev, EP1_CMD_DIMM_LEDS,
+		snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO,
 				dev->control_state, sizeof(dev->control_state));
 	} else {
 		if (ucontrol->value.integer.value[0])
@@ -243,10 +270,13 @@ static struct caiaq_controller a8dj_controller[] = {
 	{ "GND lift for TC Vinyl mode", 	24 + 0 		},
 	{ "GND lift for TC CD/Line mode", 	24 + 1 		},
 	{ "GND lift for phono mode", 		24 + 2 		},
-	{ "GND lift for TC Vinyl mode", 	24 + 3 		},
 	{ "Software lock", 			40 		}
 };
 
+static struct caiaq_controller a4dj_controller[] = {
+	{ "Current input mode",	0 | CNT_INTVAL 	}
+};
+
 static int __devinit add_controls(struct caiaq_controller *c, int num,
 				  struct snd_usb_caiaqdev *dev)
 {
@@ -295,6 +325,10 @@ int __devinit snd_usb_caiaq_control_init(struct snd_usb_caiaqdev *dev)
 		ret = add_controls(a8dj_controller,
 			ARRAY_SIZE(a8dj_controller), dev);
 		break;
+	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
+		ret = add_controls(a4dj_controller,
+			ARRAY_SIZE(a4dj_controller), dev);
+		break;
 	}
 
 	return ret;
diff --git a/sound/usb/caiaq/caiaq-device.c b/sound/usb/caiaq/caiaq-device.c
index 09aed2363cc9..cf573a982fdc 100644
--- a/sound/usb/caiaq/caiaq-device.c
+++ b/sound/usb/caiaq/caiaq-device.c
@@ -42,15 +42,17 @@
 #endif
 
 MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
-MODULE_DESCRIPTION("caiaq USB audio, version 1.3.10");
+MODULE_DESCRIPTION("caiaq USB audio, version 1.3.13");
 MODULE_LICENSE("GPL");
 MODULE_SUPPORTED_DEVICE("{{Native Instruments, RigKontrol2},"
 			 "{Native Instruments, RigKontrol3},"
 			 "{Native Instruments, Kore Controller},"
 			 "{Native Instruments, Kore Controller 2},"
 			 "{Native Instruments, Audio Kontrol 1},"
+			 "{Native Instruments, Audio 4 DJ},"
 			 "{Native Instruments, Audio 8 DJ},"
-			 "{Native Instruments, Session I/O}}");
+			 "{Native Instruments, Session I/O},"
+			 "{Native Instruments, GuitarRig mobile}");
 
 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
 static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for this card */
@@ -116,6 +118,16 @@ static struct usb_device_id snd_usb_id_table[] = {
 		.idVendor =     USB_VID_NATIVEINSTRUMENTS,
 		.idProduct =    USB_PID_SESSIONIO
 	},
+	{
+		.match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
+		.idVendor =     USB_VID_NATIVEINSTRUMENTS,
+		.idProduct =    USB_PID_GUITARRIGMOBILE
+	},
+	{
+		.match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
+		.idVendor =     USB_VID_NATIVEINSTRUMENTS,
+		.idProduct =    USB_PID_AUDIO4DJ
+	},
 	{ /* terminator */ }
 };
 
@@ -239,6 +251,8 @@ int snd_usb_caiaq_set_audio_params (struct snd_usb_caiaqdev *dev,
 		
 	if (dev->audio_parm_answer != 1) 
 		debug("unable to set the device's audio params\n");
+	else
+		dev->bpp = bpp;
 
 	return dev->audio_parm_answer == 1 ? 0 : -EINVAL;
 }
@@ -300,6 +314,12 @@ static void __devinit setup_card(struct snd_usb_caiaqdev *dev)
 		}
 
 		break;
+	case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
+		/* Audio 4 DJ - default input mode to phono */
+		dev->control_state[0] = 2;
+		snd_usb_caiaq_send_command(dev, EP1_CMD_WRITE_IO,
+			dev->control_state, 1);
+		break;
 	}
 	
 	if (dev->spec.num_analog_audio_out +
diff --git a/sound/usb/caiaq/caiaq-device.h b/sound/usb/caiaq/caiaq-device.h
index ab56e738c5fc..4cce1ad7493d 100644
--- a/sound/usb/caiaq/caiaq-device.h
+++ b/sound/usb/caiaq/caiaq-device.h
@@ -10,8 +10,10 @@
 #define USB_PID_KORECONTROLLER	0x4711
 #define USB_PID_KORECONTROLLER2	0x4712
 #define USB_PID_AK1		0x0815
+#define USB_PID_AUDIO4DJ	0x0839
 #define USB_PID_AUDIO8DJ	0x1978
 #define USB_PID_SESSIONIO	0x1915
+#define USB_PID_GUITARRIGMOBILE	0x0d8d
 
 #define EP1_BUFSIZE 64
 #define CAIAQ_USB_STR_LEN 0xff
@@ -87,9 +89,9 @@ struct snd_usb_caiaqdev {
 	int audio_out_buf_pos[MAX_STREAMS];
 	int period_in_count[MAX_STREAMS];
 	int period_out_count[MAX_STREAMS];
-	int input_panic, output_panic;
+	int input_panic, output_panic, warned;
 	char *audio_in_buf, *audio_out_buf;
-	unsigned int samplerates;
+	unsigned int samplerates, bpp;
 
 	struct snd_pcm_substream *sub_playback[MAX_STREAMS];
 	struct snd_pcm_substream *sub_capture[MAX_STREAMS];