[ 2148.890771] usb 1-1.2: Product: Ilmen Audio
[ 2148.890774] usb 1-1.2: Manufacturer: IlmenTech
[ 2148.890778] usb 1-1.2: SerialNumber: 5CDC856933
[ 2150.327668] usb 1-1.2: USB disconnect, device number 83
[ 2151.785785] usb 1-1.2: new full-speed USB device number 84 using ehci-pci
[ 2151.880680] usb 1-1.2: New USB device found, idVendor=0483, idProduct=5730
[ 2151.880687] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2151.880692] usb 1-1.2: Product: Ilmen Audio
[ 2151.880696] usb 1-1.2: Manufacturer: IlmenTech
[ 2151.880699] usb 1-1.2: SerialNumber: 5CDC856933

Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 1366:0101 SEGGER J-Link ARM
Bus 001 Device 004: ID 0483:5730 SGS Thomson Microelectronics
Bus 002 Device 003: ID 046d:c52f Logitech, Inc. Wireless Mouse M305
Bus 002 Device 004: ID 064e:f207 Suyin Corp.

Device: ID 0483:5730 SGS Thomson Microelectronics
Device Descriptor:bLength                18bDescriptorType         1bcdUSB               2.00bDeviceClass            0 (Defined at Interface level)bDeviceSubClass         0 bDeviceProtocol         0 bMaxPacketSize0         8idVendor           0x0483 SGS Thomson MicroelectronicsidProduct          0x5730 bcdDevice            2.00iManufacturer           1 iProduct                2 iSerial                 3 bNumConfigurations      1  ......

**** PLAYBACK 硬體裝置清單 ****
card 0: MID [HDA Intel MID], device 0: ALC272 Analog [ALC272 Analog]子设备: 1/1子设备 #0: subdevice #0
card 0: MID [HDA Intel MID], device 1: ALC272 Digital [ALC272 Digital]子设备: 1/1子设备 #0: subdevice #0
card 1: Audio [Ilmen Audio], device 0: USB Audio [USB Audio]子设备: 0/1子设备 #0: subdevice #0
card 2: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]子设备: 1/1子设备 #0: subdevice #0

access: MMAP_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (44100/1)
period_size: 1024
buffer_size: 16384

IlmenTech Ilmen Audio at usb-0000:00:1a.0-1.2, full speed : USB AudioPlayback:Status: StopInterface 1Altset 1Format: S16_LEChannels: 2Endpoint: 1 OUT (ASYNC)Rates: 44100

IlmenTech Ilmen Audio at usb-0000:00:1a.0-1.2, full speed : USB AudioPlayback:Status: RunningInterface = 1Altset = 1Packet Size = 196Momentary freq = 43640 Hz (0x2b.a3c0)Feedback Format = 10.14Packet Size = 0Momentary freq = 44100 Hz (0x2c.199a)Interface 1Altset 1Format: S16_LEChannels: 2Endpoint: 1 OUT (ASYNC)Rates: 44100

ead46c00 3346920735 C Zi:1:003:2 0:16:954:0 1 0:0:3 4 = f0e80b00
ead46c00 3346920736 S Zi:1:003:2 -115:16:954 1 -18:0:3 4 <
eddf8600 3346928822 C Zo:1:003:1 0:1:955:0 8 0:0:188 0:188:192 0:380:188 0:568:192 0:760:192 1524 >
eddf8600 3346928836 S Zo:1:003:1 -115:1:955 8 -18:0:188 -18:188:192 -18:380:192 -18:572:188 -18:760:192 1524 = a503c8fd 7703c6fd 3f03c3fd 0803c3fd d102c6fd 9102ccfd 5702d4fd 1602dafd
ea4cbc00 3346936710 C Zo:1:003:1 0:1:963:0 8 0:0:188 0:188:192 0:380:192 0:572:188 0:760:192 1524 >
ea4cbc00 3346936723 S Zo:1:003:1 -115:1:963 8 -18:0:188 -18:188:192 -18:380:192 -18:572:188 -18:760:192 1524 = 08fbf9fa 22fbe5fa 40fbd2fa 5efbc1fa 83fbb9fa abfbb5fa d4fbaffa 03fcb1fa
ead46e40 3346936729 C Zi:1:003:2 0:16:970:0 1 0:0:3 4 = f0e80b00

109    Here is the list of words, from left to right:
110
111    - URB Tag. This is used to identify URBs, and is normally an in-kernel address
112      of the URB structure in hexadecimal, but can be a sequence number or any
113      other unique string, within reason.
114
115    - Timestamp in microseconds, a decimal number. The timestamp's resolution
116      depends on available clock, and so it can be much worse than a microsecond
117      (if the implementation uses jiffies, for example).
118
119    - Event Type. This type refers to the format of the event, not URB type.
120      Available types are: S - submission, C - callback, E - submission error.
121
122    - "Address" word (formerly a "pipe"). It consists of four fields, separated by
123      colons: URB type and direction, Bus number, Device address, Endpoint number.
124      Type and direction are encoded with two bytes in the following manner:
125        Ci Co   Control input and output
126        Zi Zo   Isochronous input and output
127        Ii Io   Interrupt input and output
128        Bi Bo   Bulk input and output
129      Bus number, Device address, and Endpoint are decimal numbers, but they may
130      have leading zeros, for the sake of human readers.
131
132    - URB Status word. This is either a letter, or several numbers separated
133      by colons: URB status, interval, start frame, and error count. Unlike the
134      "address" word, all fields save the status are optional. Interval is printed
135      only for interrupt and isochronous URBs. Start frame is printed only for
136      isochronous URBs. Error count is printed only for isochronous callback
137      events.
138
139      The status field is a decimal number, sometimes negative, which represents
140      a "status" field of the URB. This field makes no sense for submissions, but
141      is present anyway to help scripts with parsing. When an error occurs, the
142      field contains the error code.
143
144      In case of a submission of a Control packet, this field contains a Setup Tag
145      instead of an group of numbers. It is easy to tell whether the Setup Tag is
146      present because it is never a number. Thus if scripts find a set of numbers
147      in this word, they proceed to read Data Length (except for isochronous URBs).
148      If they find something else, like a letter, they read the setup packet before
149      reading the Data Length or isochronous descriptors.
150
151    - Setup packet, if present, consists of 5 words: one of each for bmRequestType,
152      bRequest, wValue, wIndex, wLength, as specified by the USB Specification 2.0.
153      These words are safe to decode if Setup Tag was 's'. Otherwise, the setup
154      packet was present, but not captured, and the fields contain filler.
155
156    - Number of isochronous frame descriptors and descriptors themselves.
157      If an Isochronous transfer event has a set of descriptors, a total number
158      of them in an URB is printed first, then a word per descriptor, up to a
159      total of 5. The word consists of 3 colon-separated decimal numbers for
160      status, offset, and length respectively. For submissions, initial length
161      is reported. For callbacks, actual length is reported.
162
163    - Data Length. For submissions, this is the requested length. For callbacks,
164      this is the actual length.
165
166    - Data tag. The usbmon may not always capture data, even if length is nonzero.
167      The data words are present only if this tag is '='.
168
169    - Data words follow, in big endian hexadecimal format. Notice that they are
170      not machine words, but really just a byte stream split into words to make
171      it easier to read. Thus, the last word may contain from one to four bytes.
172      The length of collected data is limited and can be less than the data length
173      reported in the Data Length word. In the case of an Isochronous input (Zi)
174      completion where the received data is sparse in the buffer, the length of
175      the collected data can be greater than the Data Length value (because Data
176      Length counts only the bytes that were received whereas the Data words
177      contain the entire transfer buffer).

ead46c00 3346920735 C Zi:1:003:2 0:16:954:0 1 0:0:3 4 = f0e80b00
ead46c00 3346920736 S Zi:1:003:2 -115:16:954 1 -18:0:3 4 <
eddf8600 3346928822 C Zo:1:003:1 0:1:955:0 8 0:0:188 0:188:192 0:380:188 0:568:192 0:760:192 1524 >
eddf8600 3346928836 S Zo:1:003:1 -115:1:955 8 -18:0:188 -18:188:192 -18:380:192 -18:572:188 -18:760:192 1524 = a503c8fd 7703c6fd 3f03c3fd 0803c3fd d102c6fd 9102ccfd 5702d4fd 1602dafd

......
ead46c00 3346920735 C Zi:1:003:2 0:16:954:0 1 0:0:3 4 = f0e80b00
......
ead46e40 3346936729 C Zi:1:003:2 0:16:970:0 1 0:0:3 4 = f0e80b00......