diff --git a/lib/bluetooth.h b/lib/bluetooth.h
index 73297c147..af5fbcfbc 100644
--- a/lib/bluetooth.h
+++ b/lib/bluetooth.h
@@ -413,6 +413,10 @@ void bt_free(void *ptr);
 int bt_error(uint16_t code);
 const char *bt_compidtostr(int id);
 
+typedef struct {
+	uint8_t data[3];
+} uint24_t;
+
 typedef struct {
 	uint8_t data[16];
 } uint128_t;
diff --git a/monitor/att.c b/monitor/att.c
index 2b1e21d05..fb0961102 100644
--- a/monitor/att.c
+++ b/monitor/att.c
@@ -255,6 +255,38 @@ static void gatt_ccc_write(const struct l2cap_frame *frame)
 	print_ccc_value(value);
 }
 
+static bool print_codec(const struct l2cap_frame *frame)
+{
+	uint8_t codec_id;
+	uint16_t codec_cid, codec_vid;
+
+	if (!l2cap_frame_get_u8((void *)frame, &codec_id)) {
+		print_text(COLOR_ERROR, "Codec: invalid size");
+		return false;
+	}
+
+	packet_print_codec_id("    Codec", codec_id);
+
+	if (!l2cap_frame_get_le16((void *)frame, &codec_cid)) {
+		print_text(COLOR_ERROR, "Codec Company ID: invalid size");
+		return false;
+	}
+
+	if (!l2cap_frame_get_le16((void *)frame, &codec_vid)) {
+		print_text(COLOR_ERROR, "Codec Vendor ID: invalid size");
+		return false;
+	}
+
+	if (codec_id == 0xff) {
+		print_field("    Codec Company ID: %s (0x%04x)",
+						bt_compidtostr(codec_cid),
+						codec_cid);
+		print_field("    Codec Vendor ID: 0x%04x", codec_vid);
+	}
+
+	return true;
+}
+
 static void print_pac(const struct l2cap_frame *frame)
 {
 	uint8_t num = 0, i;
@@ -267,38 +299,13 @@ static void print_pac(const struct l2cap_frame *frame)
 	print_field("  Number of PAC(s): %u", num);
 
 	for (i = 0; i < num; i++) {
-		uint8_t codec_id;
-		uint16_t codec_cid, codec_vid;
 		struct bt_hci_lv_data *cc;
 		struct bt_hci_lv_data *meta;
 
 		print_field("  PAC #%u:", i);
 
-		if (!l2cap_frame_get_u8((void *)frame, &codec_id)) {
-			print_text(COLOR_ERROR, "Codec: invalid size");
+		if (!print_codec(frame))
 			goto done;
-		}
-
-		packet_print_codec_id("    Codec", codec_id);
-
-		if (!l2cap_frame_get_le16((void *)frame, &codec_cid)) {
-			print_text(COLOR_ERROR,
-					"Codec Company ID: invalid size");
-			goto done;
-		}
-
-		if (!l2cap_frame_get_le16((void *)frame, &codec_vid)) {
-			print_text(COLOR_ERROR,
-					"Codec Vendor ID: invalid size");
-			goto done;
-		}
-
-		if (codec_id == 0xff) {
-			print_field("    Codec Company ID: %s (0x%04x)",
-						bt_compidtostr(codec_cid),
-						codec_cid);
-			print_field("    Codec Vendor ID: 0x%04x", codec_vid);
-		}
 
 		cc = l2cap_frame_pull((void *)frame, frame, sizeof(*cc));
 		if (!cc) {
@@ -345,6 +352,310 @@ static void pac_notify(const struct l2cap_frame *frame)
 	print_pac(frame);
 }
 
+static void print_prefer_framing(uint8_t value)
+{
+	switch (value) {
+	case 0x00:
+		print_field("    Framing: Unframed ISOAL PDUs supported "
+							"(0x%2.2x)", value);
+		return;
+	case 0x01:
+		print_field("    Framing: Unframed ISOAL PDUs not supported "
+							"(0x%2.2x)", value);
+		return;
+	default:
+		print_field("    Framing: Reserved (0x%2.2x)", value);
+	}
+}
+
+static const struct bitfield_data prefer_phy_table[] = {
+	{  0, "LE 1M PHY preffered (0x01)"		},
+	{  1, "LE 2M PHY preffered (0x02)"		},
+	{  2, "LE Codec PHY preffered (0x04)"		},
+	{ }
+};
+
+static void print_prefer_phy(uint8_t phy)
+{
+	uint8_t mask;
+
+	mask = print_bitfield(4, phy, prefer_phy_table);
+	if (mask)
+		print_text(COLOR_WHITE_BG, "    Unknown fields (0x%2.2x)",
+								mask);
+}
+
+static void print_ase_config(const struct l2cap_frame *frame)
+{
+	uint8_t framing, phy, rtn;
+	uint16_t latency;
+	uint32_t pd_min, pd_max, ppd_min, ppd_max;
+	struct bt_hci_lv_data *cc;
+
+	if (!l2cap_frame_get_u8((void *)frame, &framing)) {
+		print_text(COLOR_ERROR, "Framing: invalid size");
+		return;
+	}
+
+	print_prefer_framing(framing);
+
+	if (!l2cap_frame_get_u8((void *)frame, &phy)) {
+		print_text(COLOR_ERROR, "PHY: invalid size");
+		return;
+	}
+
+	print_prefer_phy(phy);
+
+	if (!l2cap_frame_get_u8((void *)frame, &rtn)) {
+		print_text(COLOR_ERROR, "RTN: invalid size");
+		return;
+	}
+
+	print_field("    RTN: %u", rtn);
+
+	if (!l2cap_frame_get_le16((void *)frame, &latency)) {
+		print_text(COLOR_ERROR, "RTN: invalid size");
+		return;
+	}
+
+	print_field("    Max Transport Latency: %u ms", latency);
+
+	if (!l2cap_frame_get_le24((void *)frame, &pd_min)) {
+		print_text(COLOR_ERROR, "Presentation Delay Min: invalid size");
+		return;
+	}
+
+	print_field("    Presentation Delay Min: %u us", pd_min);
+
+	if (!l2cap_frame_get_le24((void *)frame, &pd_max)) {
+		print_text(COLOR_ERROR, "Presentation Delay Max: invalid size");
+		return;
+	}
+
+	print_field("    Presentation Delay Max: %u us", pd_max);
+
+	if (!l2cap_frame_get_le24((void *)frame, &ppd_min)) {
+		print_text(COLOR_ERROR,
+			"Preferred Presentation Delay Min: invalid size");
+		return;
+	}
+
+	print_field("    Preferred Presentation Delay Min: %u us", ppd_min);
+
+	if (!l2cap_frame_get_le24((void *)frame, &ppd_max)) {
+		print_text(COLOR_ERROR,
+			"Preferred Presentation Delay Max: invalid size");
+		return;
+	}
+
+	print_field("    Preferred Presentation Delay Max: %u us", ppd_max);
+
+	if (!print_codec(frame))
+		return;
+
+	cc = l2cap_frame_pull((void *)frame, frame, sizeof(*cc));
+	if (!cc) {
+		print_text(COLOR_ERROR,
+				"Codec Specific Configuration: invalid size");
+		return;
+	}
+
+	if (!l2cap_frame_pull((void *)frame, frame, cc->len)) {
+		print_text(COLOR_ERROR,
+				"Codec Specific Configuration: invalid size");
+		return;
+	}
+
+	packet_print_ltv("    Codec Specific Configuration", cc->data, cc->len);
+}
+
+static void print_framing(uint8_t value)
+{
+	switch (value) {
+	case 0x00:
+		print_field("    Framing: Unframed (0x%2.2x)", value);
+		break;
+	case 0x01:
+		print_field("    Framing: Framed (0x%2.2x)", value);
+		break;
+	default:
+		print_field("    Framing: Reserved (0x%2.2x)", value);
+	}
+}
+
+static const struct bitfield_data phy_table[] = {
+	{  0, "LE 1M PHY (0x01)"		},
+	{  1, "LE 2M PHY (0x02)"		},
+	{  2, "LE Codec PHY (0x04)"		},
+	{ }
+};
+
+static void print_phy(uint8_t phy)
+{
+	uint8_t mask;
+
+	mask = print_bitfield(4, phy, phy_table);
+	if (mask)
+		print_text(COLOR_WHITE_BG, "    Unknown fields (0x%2.2x)",
+								mask);
+}
+
+static void print_ase_qos(const struct l2cap_frame *frame)
+{
+	uint8_t framing, phy, rtn;
+	uint16_t sdu, latency;
+	uint32_t interval, pd;
+
+	if (!l2cap_frame_print_u8((void *)frame, "    CIG ID"))
+		return;
+
+	if (!l2cap_frame_print_u8((void *)frame, "    CIS ID"))
+		return;
+
+	if (!l2cap_frame_get_le24((void *)frame, &interval)) {
+		print_text(COLOR_ERROR, "SDU Interval: invalid size");
+		return;
+	}
+
+	print_field("    SDU Interval: %u us", interval);
+
+	if (!l2cap_frame_get_u8((void *)frame, &framing)) {
+		print_text(COLOR_ERROR, "Framing: invalid size");
+		return;
+	}
+
+	print_framing(framing);
+
+	if (!l2cap_frame_get_u8((void *)frame, &phy)) {
+		print_text(COLOR_ERROR, "PHY: invalid size");
+		return;
+	}
+
+	print_phy(phy);
+
+	if (!l2cap_frame_get_le16((void *)frame, &sdu)) {
+		print_text(COLOR_ERROR, "Max SDU: invalid size");
+		return;
+	}
+
+	print_field("    Max SDU: %u", sdu);
+
+	if (!l2cap_frame_get_u8((void *)frame, &rtn)) {
+		print_text(COLOR_ERROR, "RTN: invalid size");
+		return;
+	}
+
+	print_field("    RTN: %u", rtn);
+
+	if (!l2cap_frame_get_le16((void *)frame, &latency)) {
+		print_text(COLOR_ERROR, "Max Transport Latency: invalid size");
+		return;
+	}
+
+	print_field("    Max Transport Latency: %u", sdu);
+
+	if (!l2cap_frame_get_le24((void *)frame, &pd)) {
+		print_text(COLOR_ERROR, "Presentation Delay: invalid size");
+		return;
+	}
+
+	print_field("    Presentation Delay: %u us", pd);
+}
+
+static void print_ase_metadata(const struct l2cap_frame *frame)
+{
+	struct bt_hci_lv_data *meta;
+
+	if (!l2cap_frame_print_u8((void *)frame, "    CIG ID"))
+		return;
+
+	if (!l2cap_frame_print_u8((void *)frame, "    CIS ID"))
+		return;
+
+	meta = l2cap_frame_pull((void *)frame, frame, sizeof(*meta));
+	if (!meta) {
+		print_text(COLOR_ERROR, "Metadata: invalid size");
+		return;
+	}
+
+	if (!l2cap_frame_pull((void *)frame, frame, meta->len)) {
+		print_text(COLOR_ERROR, "Metadata: invalid size");
+		return;
+	}
+
+	packet_print_ltv("    Metadata", meta->data, meta->len);
+}
+
+static void print_ase_status(const struct l2cap_frame *frame)
+{
+	uint8_t id, state;
+
+	if (!l2cap_frame_get_u8((void *)frame, &id)) {
+		print_text(COLOR_ERROR, "ASE ID: invalid size");
+		goto done;
+	}
+
+	print_field("    ASE ID: %u", id);
+
+	if (!l2cap_frame_get_u8((void *)frame, &state)) {
+		print_text(COLOR_ERROR, "ASE State: invalid size");
+		goto done;
+	}
+
+	switch (state) {
+	/* ASE_State = 0x00 (Idle) */
+	case 0x00:
+		print_field("    State: Idle (0x00)");
+		break;
+	/* ASE_State = 0x01 (Codec Configured) */
+	case 0x01:
+		print_field("    State: Codec Configured (0x01)");
+		print_ase_config(frame);
+		break;
+	/* ASE_State = 0x02 (QoS Configured) */
+	case 0x02:
+		print_field("    State: QoS Configured (0x02)");
+		print_ase_qos(frame);
+		break;
+	/* ASE_Status = 0x03 (Enabling) */
+	case 0x03:
+		print_field("    State: Enabling (0x03)");
+		print_ase_metadata(frame);
+		break;
+	/* ASE_Status = 0x04 (Streaming) */
+	case 0x04:
+		print_field("    State: Streaming (0x04)");
+		print_ase_metadata(frame);
+		break;
+	/* ASE_Status = 0x05 (Disabling) */
+	case 0x05:
+		print_field("    State: Disabling (0x05)");
+		print_ase_metadata(frame);
+		break;
+	/* ASE_Status = 0x06 (Releasing) */
+	case 0x06:
+		print_field("    State: Releasing (0x06)");
+		break;
+	default:
+		print_field("    State: Reserved (0x%2.2x)", state);
+		break;
+	}
+
+done:
+	if (frame->size)
+		print_hex_field("  Data", frame->data, frame->size);
+}
+
+static void ase_read(const struct l2cap_frame *frame)
+{
+	print_ase_status(frame);
+}
+
+static void ase_notify(const struct l2cap_frame *frame)
+{
+	print_ase_status(frame);
+}
+
 #define GATT_HANDLER(_uuid, _read, _write, _notify) \
 { \
 	.uuid = { \
@@ -366,6 +677,8 @@ struct gatt_handler {
 					gatt_ccc_write, NULL),
 	GATT_HANDLER(PAC_SINK_CHRC_UUID, pac_read, NULL, pac_notify),
 	GATT_HANDLER(PAC_SOURCE_CHRC_UUID, pac_read, NULL, pac_notify),
+	GATT_HANDLER(ASE_SINK_UUID, ase_read, NULL, ase_notify),
+	GATT_HANDLER(ASE_SOURCE_UUID, ase_read, NULL, ase_notify),
 };
 
 static struct gatt_handler *get_handler(struct gatt_db_attribute *attr)
diff --git a/monitor/l2cap.h b/monitor/l2cap.h
index c33d4c57f..00a8ffbbd 100644
--- a/monitor/l2cap.h
+++ b/monitor/l2cap.h
@@ -78,6 +78,21 @@ static inline bool l2cap_frame_get_u8(struct l2cap_frame *frame, uint8_t *value)
 	return true;
 }
 
+static inline bool l2cap_frame_print_u8(struct l2cap_frame *frame,
+					const char *label)
+{
+	uint8_t u8;
+
+	if (!l2cap_frame_get_u8(frame, &u8)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%2.2x", label, u8);
+
+	return true;
+}
+
 static inline bool l2cap_frame_get_be16(struct l2cap_frame *frame,
 								uint16_t *value)
 {
@@ -92,6 +107,21 @@ static inline bool l2cap_frame_get_be16(struct l2cap_frame *frame,
 	return true;
 }
 
+static inline bool l2cap_frame_print_be16(struct l2cap_frame *frame,
+						const char *label)
+{
+	uint16_t u16;
+
+	if (!l2cap_frame_get_be16(frame, &u16)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%4.4x", label, u16);
+
+	return true;
+}
+
 static inline bool l2cap_frame_get_le16(struct l2cap_frame *frame,
 								uint16_t *value)
 {
@@ -106,6 +136,79 @@ static inline bool l2cap_frame_get_le16(struct l2cap_frame *frame,
 	return true;
 }
 
+static inline bool l2cap_frame_print_le16(struct l2cap_frame *frame,
+						const char *label)
+{
+	uint16_t u16;
+
+	if (!l2cap_frame_get_le16(frame, &u16)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%4.4x", label, u16);
+
+	return true;
+}
+
+static inline bool l2cap_frame_get_be24(struct l2cap_frame *frame,
+								uint32_t *value)
+{
+	if (frame->size < sizeof(uint24_t))
+		return false;
+
+	if (value)
+		*value = get_be24(frame->data);
+
+	l2cap_frame_pull(frame, frame, sizeof(uint24_t));
+
+	return true;
+}
+
+static inline bool l2cap_frame_print_be24(struct l2cap_frame *frame,
+						const char *label)
+{
+	uint32_t u24;
+
+	if (!l2cap_frame_get_be24(frame, &u24)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%6.6x", label, u24);
+
+	return true;
+}
+
+static inline bool l2cap_frame_get_le24(struct l2cap_frame *frame,
+								uint32_t *value)
+{
+	if (frame->size < sizeof(uint24_t))
+		return false;
+
+	if (value)
+		*value = get_le24(frame->data);
+
+	l2cap_frame_pull(frame, frame, sizeof(uint24_t));
+
+	return true;
+}
+
+static inline bool l2cap_frame_print_le24(struct l2cap_frame *frame,
+						const char *label)
+{
+	uint32_t u24;
+
+	if (!l2cap_frame_get_le24(frame, &u24)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%6.6x", label, u24);
+
+	return true;
+}
+
 static inline bool l2cap_frame_get_be32(struct l2cap_frame *frame,
 								uint32_t *value)
 {
@@ -120,6 +223,21 @@ static inline bool l2cap_frame_get_be32(struct l2cap_frame *frame,
 	return true;
 }
 
+static inline bool l2cap_frame_print_be32(struct l2cap_frame *frame,
+						const char *label)
+{
+	uint32_t u32;
+
+	if (!l2cap_frame_get_be32(frame, &u32)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%8.8x", label, u32);
+
+	return true;
+}
+
 static inline bool l2cap_frame_get_le32(struct l2cap_frame *frame,
 								uint32_t *value)
 {
@@ -134,6 +252,21 @@ static inline bool l2cap_frame_get_le32(struct l2cap_frame *frame,
 	return true;
 }
 
+static inline bool l2cap_frame_print_le32(struct l2cap_frame *frame,
+						const char *label)
+{
+	uint32_t u32;
+
+	if (!l2cap_frame_get_le32(frame, &u32)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%8.8x", label, u32);
+
+	return true;
+}
+
 static inline bool l2cap_frame_get_be64(struct l2cap_frame *frame,
 								uint64_t *value)
 {
@@ -148,6 +281,21 @@ static inline bool l2cap_frame_get_be64(struct l2cap_frame *frame,
 	return true;
 }
 
+static inline bool l2cap_frame_print_be64(struct l2cap_frame *frame,
+						const char *label)
+{
+	uint64_t u64;
+
+	if (!l2cap_frame_get_be64(frame, &u64)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%zx", label, u64);
+
+	return true;
+}
+
 static inline bool l2cap_frame_get_le64(struct l2cap_frame *frame,
 								uint64_t *value)
 {
@@ -162,6 +310,21 @@ static inline bool l2cap_frame_get_le64(struct l2cap_frame *frame,
 	return true;
 }
 
+static inline bool l2cap_frame_print_le64(struct l2cap_frame *frame,
+						const char *label)
+{
+	uint64_t u64;
+
+	if (!l2cap_frame_get_le64(frame, &u64)) {
+		print_text(COLOR_ERROR, "%s: invalid size", label);
+		return false;
+	}
+
+	print_field("%s: 0x%zx", label, u64);
+
+	return true;
+}
+
 static inline bool l2cap_frame_get_be128(struct l2cap_frame *frame,
 					uint64_t *lvalue, uint64_t *rvalue)
 {
diff --git a/src/shared/ascs.h b/src/shared/ascs.h
index 230fdfe8a..2c875bd17 100644
--- a/src/shared/ascs.h
+++ b/src/shared/ascs.h
@@ -101,8 +101,8 @@ struct bt_ascs_ase_status_qos {
 	uint8_t  pd[3];
 } __packed;
 
-/* ASE_Status = 0x03 (Enabling), 0x04 (Streaming), 0x05 (Disabling), or
- * 0x06 (Releasing), defined in Table 4.9.
+/* ASE_Status = 0x03 (Enabling), 0x04 (Streaming), or 0x05 (Disabling)
+ * defined in Table 4.9.
  */
 struct bt_ascs_ase_status_metadata {
 	uint8_t  cig_id;
