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  1. DMESG:
  2.  
  3. [18379.648141] usb 4-4: USB disconnect, device number 3
  4. [22825.784462] usb 1-1: new high-speed USB device number 3 using ehci_hcd
  5. [22825.920193] hid-generic 0003:0926:0202.0002: hiddev0,hidraw1: USB HID v1.01 Device [Sound Devices USBPre2] on usb-0000:00:02.1-1/input3
  6.  
  7. lsusb:
  8.  
  9. [alex@burken ~]$ sudo lsusb -vv | grep USBPre2 -a500
  10.  
  11. Bus 001 Device 003: ID 0926:0202
  12. Device Descriptor:
  13. bLength 18
  14. bDescriptorType 1
  15. bcdUSB 2.00
  16. bDeviceClass 239 Miscellaneous Device
  17. bDeviceSubClass 2 ?
  18. bDeviceProtocol 1 Interface Association
  19. bMaxPacketSize0 64
  20. idVendor 0x0926
  21. idProduct 0x0202
  22. bcdDevice 1.00
  23. iManufacturer 1 Sound Devices
  24. iProduct 2 USBPre2
  25. iSerial 3 HB0711306000
  26. bNumConfigurations 1
  27. Configuration Descriptor:
  28. bLength 9
  29. bDescriptorType 2
  30. wTotalLength 394
  31. bNumInterfaces 4
  32. bConfigurationValue 1
  33. iConfiguration 0
  34. bmAttributes 0x80
  35. (Bus Powered)
  36. MaxPower 480mA
  37. Interface Association:
  38. bLength 8
  39. bDescriptorType 11
  40. bFirstInterface 0
  41. bInterfaceCount 3
  42. bFunctionClass 1 Audio
  43. bFunctionSubClass 0
  44. bFunctionProtocol 0
  45. iFunction 0
  46. Interface Descriptor:
  47. bLength 9
  48. bDescriptorType 4
  49. bInterfaceNumber 0
  50. bAlternateSetting 0
  51. bNumEndpoints 0
  52. bInterfaceClass 1 Audio
  53. bInterfaceSubClass 1 Control Device
  54. bInterfaceProtocol 0
  55. iInterface 0
  56. AudioControl Interface Descriptor:
  57. bLength 10
  58. bDescriptorType 36
  59. bDescriptorSubtype 1 (HEADER)
  60. bcdADC 1.00
  61. wTotalLength 52
  62. bInCollection 2
  63. baInterfaceNr( 0) 1
  64. baInterfaceNr( 1) 2
  65. AudioControl Interface Descriptor:
  66. bLength 12
  67. bDescriptorType 36
  68. bDescriptorSubtype 2 (INPUT_TERMINAL)
  69. bTerminalID 1
  70. wTerminalType 0x0101 USB Streaming
  71. bAssocTerminal 0
  72. bNrChannels 2
  73. wChannelConfig 0x0003
  74. Left Front (L)
  75. Right Front (R)
  76. iChannelNames 0
  77. iTerminal 0
  78. AudioControl Interface Descriptor:
  79. bLength 9
  80. bDescriptorType 36
  81. bDescriptorSubtype 3 (OUTPUT_TERMINAL)
  82. bTerminalID 2
  83. wTerminalType 0x0301 Speaker
  84. bAssocTerminal 0
  85. bSourceID 1
  86. iTerminal 0
  87. AudioControl Interface Descriptor:
  88. bLength 12
  89. bDescriptorType 36
  90. bDescriptorSubtype 2 (INPUT_TERMINAL)
  91. bTerminalID 3
  92. wTerminalType 0x0602 Digital Audio Interface
  93. bAssocTerminal 0
  94. bNrChannels 2
  95. wChannelConfig 0x0003
  96. Left Front (L)
  97. Right Front (R)
  98. iChannelNames 0
  99. iTerminal 0
  100. AudioControl Interface Descriptor:
  101. bLength 9
  102. bDescriptorType 36
  103. bDescriptorSubtype 3 (OUTPUT_TERMINAL)
  104. bTerminalID 4
  105. wTerminalType 0x0101 USB Streaming
  106. bAssocTerminal 0
  107. bSourceID 3
  108. iTerminal 0
  109. Interface Descriptor:
  110. bLength 9
  111. bDescriptorType 4
  112. bInterfaceNumber 1
  113. bAlternateSetting 0
  114. bNumEndpoints 0
  115. bInterfaceClass 1 Audio
  116. bInterfaceSubClass 2 Streaming
  117. bInterfaceProtocol 0
  118. iInterface 0
  119. Interface Descriptor:
  120. bLength 9
  121. bDescriptorType 4
  122. bInterfaceNumber 1
  123. bAlternateSetting 1
  124. bNumEndpoints 2
  125. bInterfaceClass 1 Audio
  126. bInterfaceSubClass 2 Streaming
  127. bInterfaceProtocol 0
  128. iInterface 0
  129. AudioStreaming Interface Descriptor:
  130. bLength 7
  131. bDescriptorType 36
  132. bDescriptorSubtype 1 (AS_GENERAL)
  133. bTerminalLink 1
  134. bDelay 1 frames
  135. wFormatTag 1 PCM
  136. AudioStreaming Interface Descriptor:
  137. bLength 26
  138. bDescriptorType 36
  139. bDescriptorSubtype 2 (FORMAT_TYPE)
  140. bFormatType 1 (FORMAT_TYPE_I)
  141. bNrChannels 2
  142. bSubframeSize 2
  143. bBitResolution 16
  144. bSamFreqType 6 Discrete
  145. tSamFreq[ 0] 8000
  146. tSamFreq[ 1] 16000
  147. tSamFreq[ 2] 24000
  148. tSamFreq[ 3] 32000
  149. tSamFreq[ 4] 44100
  150. tSamFreq[ 5] 48000
  151. Endpoint Descriptor:
  152. bLength 9
  153. bDescriptorType 5
  154. bEndpointAddress 0x06 EP 6 OUT
  155. bmAttributes 5
  156. Transfer Type Isochronous
  157. Synch Type Asynchronous
  158. Usage Type Data
  159. wMaxPacketSize 0x0126 1x 294 bytes
  160. bInterval 4
  161. bRefresh 0
  162. bSynchAddress 129
  163. AudioControl Endpoint Descriptor:
  164. bLength 7
  165. bDescriptorType 37
  166. bDescriptorSubtype 1 (EP_GENERAL)
  167. bmAttributes 0x01
  168. Sampling Frequency
  169. bLockDelayUnits 2 Decoded PCM samples
  170. wLockDelay 0 Decoded PCM samples
  171. Endpoint Descriptor:
  172. bLength 9
  173. bDescriptorType 5
  174. bEndpointAddress 0x81 EP 1 IN
  175. bmAttributes 1
  176. Transfer Type Isochronous
  177. Synch Type None
  178. Usage Type Data
  179. wMaxPacketSize 0x0003 1x 3 bytes
  180. bInterval 4
  181. bRefresh 5
  182. bSynchAddress 0
  183. Interface Descriptor:
  184. bLength 9
  185. bDescriptorType 4
  186. bInterfaceNumber 1
  187. bAlternateSetting 2
  188. bNumEndpoints 2
  189. bInterfaceClass 1 Audio
  190. bInterfaceSubClass 2 Streaming
  191. bInterfaceProtocol 0
  192. iInterface 0
  193. AudioStreaming Interface Descriptor:
  194. bLength 7
  195. bDescriptorType 36
  196. bDescriptorSubtype 1 (AS_GENERAL)
  197. bTerminalLink 1
  198. bDelay 1 frames
  199. wFormatTag 1 PCM
  200. AudioStreaming Interface Descriptor:
  201. bLength 26
  202. bDescriptorType 36
  203. bDescriptorSubtype 2 (FORMAT_TYPE)
  204. bFormatType 1 (FORMAT_TYPE_I)
  205. bNrChannels 2
  206. bSubframeSize 3
  207. bBitResolution 24
  208. bSamFreqType 6 Discrete
  209. tSamFreq[ 0] 8000
  210. tSamFreq[ 1] 16000
  211. tSamFreq[ 2] 24000
  212. tSamFreq[ 3] 32000
  213. tSamFreq[ 4] 44100
  214. tSamFreq[ 5] 48000
  215. Endpoint Descriptor:
  216. bLength 9
  217. bDescriptorType 5
  218. bEndpointAddress 0x06 EP 6 OUT
  219. bmAttributes 5
  220. Transfer Type Isochronous
  221. Synch Type Asynchronous
  222. Usage Type Data
  223. wMaxPacketSize 0x0126 1x 294 bytes
  224. bInterval 4
  225. bRefresh 0
  226. bSynchAddress 129
  227. AudioControl Endpoint Descriptor:
  228. bLength 7
  229. bDescriptorType 37
  230. bDescriptorSubtype 1 (EP_GENERAL)
  231. bmAttributes 0x01
  232. Sampling Frequency
  233. bLockDelayUnits 2 Decoded PCM samples
  234. wLockDelay 0 Decoded PCM samples
  235. Endpoint Descriptor:
  236. bLength 9
  237. bDescriptorType 5
  238. bEndpointAddress 0x81 EP 1 IN
  239. bmAttributes 1
  240. Transfer Type Isochronous
  241. Synch Type None
  242. Usage Type Data
  243. wMaxPacketSize 0x0003 1x 3 bytes
  244. bInterval 4
  245. bRefresh 5
  246. bSynchAddress 0
  247. Interface Descriptor:
  248. bLength 9
  249. bDescriptorType 4
  250. bInterfaceNumber 1
  251. bAlternateSetting 3
  252. bNumEndpoints 2
  253. bInterfaceClass 255 Vendor Specific Class
  254. bInterfaceSubClass 0
  255. bInterfaceProtocol 0
  256. iInterface 0
  257. Endpoint Descriptor:
  258. bLength 7
  259. bDescriptorType 5
  260. bEndpointAddress 0x85 EP 5 IN
  261. bmAttributes 5
  262. Transfer Type Isochronous
  263. Synch Type Asynchronous
  264. Usage Type Data
  265. wMaxPacketSize 0x0126 1x 294 bytes
  266. bInterval 1
  267. Endpoint Descriptor:
  268. bLength 7
  269. bDescriptorType 5
  270. bEndpointAddress 0x06 EP 6 OUT
  271. bmAttributes 5
  272. Transfer Type Isochronous
  273. Synch Type Asynchronous
  274. Usage Type Data
  275. wMaxPacketSize 0x0126 1x 294 bytes
  276. bInterval 1
  277. Interface Descriptor:
  278. bLength 9
  279. bDescriptorType 4
  280. bInterfaceNumber 2
  281. bAlternateSetting 0
  282. bNumEndpoints 0
  283. bInterfaceClass 1 Audio
  284. bInterfaceSubClass 2 Streaming
  285. bInterfaceProtocol 0
  286. iInterface 0
  287. Interface Descriptor:
  288. bLength 9
  289. bDescriptorType 4
  290. bInterfaceNumber 2
  291. bAlternateSetting 1
  292. bNumEndpoints 1
  293. bInterfaceClass 1 Audio
  294. bInterfaceSubClass 2 Streaming
  295. bInterfaceProtocol 0
  296. iInterface 0
  297. AudioStreaming Interface Descriptor:
  298. bLength 7
  299. bDescriptorType 36
  300. bDescriptorSubtype 1 (AS_GENERAL)
  301. bTerminalLink 4
  302. bDelay 1 frames
  303. wFormatTag 1 PCM
  304. AudioStreaming Interface Descriptor:
  305. bLength 26
  306. bDescriptorType 36
  307. bDescriptorSubtype 2 (FORMAT_TYPE)
  308. bFormatType 1 (FORMAT_TYPE_I)
  309. bNrChannels 2
  310. bSubframeSize 2
  311. bBitResolution 16
  312. bSamFreqType 6 Discrete
  313. tSamFreq[ 0] 8000
  314. tSamFreq[ 1] 16000
  315. tSamFreq[ 2] 24000
  316. tSamFreq[ 3] 32000
  317. tSamFreq[ 4] 44100
  318. tSamFreq[ 5] 48000
  319. Endpoint Descriptor:
  320. bLength 9
  321. bDescriptorType 5
  322. bEndpointAddress 0x85 EP 5 IN
  323. bmAttributes 5
  324. Transfer Type Isochronous
  325. Synch Type Asynchronous
  326. Usage Type Data
  327. wMaxPacketSize 0x0126 1x 294 bytes
  328. bInterval 4
  329. bRefresh 0
  330. bSynchAddress 0
  331. AudioControl Endpoint Descriptor:
  332. bLength 7
  333. bDescriptorType 37
  334. bDescriptorSubtype 1 (EP_GENERAL)
  335. bmAttributes 0x01
  336. Sampling Frequency
  337. bLockDelayUnits 2 Decoded PCM samples
  338. wLockDelay 0 Decoded PCM samples
  339. Interface Descriptor:
  340. bLength 9
  341. bDescriptorType 4
  342. bInterfaceNumber 2
  343. bAlternateSetting 2
  344. bNumEndpoints 1
  345. bInterfaceClass 1 Audio
  346. bInterfaceSubClass 2 Streaming
  347. bInterfaceProtocol 0
  348. iInterface 0
  349. AudioStreaming Interface Descriptor:
  350. bLength 7
  351. bDescriptorType 36
  352. bDescriptorSubtype 1 (AS_GENERAL)
  353. bTerminalLink 4
  354. bDelay 1 frames
  355. wFormatTag 1 PCM
  356. AudioStreaming Interface Descriptor:
  357. bLength 26
  358. bDescriptorType 36
  359. bDescriptorSubtype 2 (FORMAT_TYPE)
  360. bFormatType 1 (FORMAT_TYPE_I)
  361. bNrChannels 2
  362. bSubframeSize 3
  363. bBitResolution 24
  364. bSamFreqType 6 Discrete
  365. tSamFreq[ 0] 8000
  366. tSamFreq[ 1] 16000
  367. tSamFreq[ 2] 24000
  368. tSamFreq[ 3] 32000
  369. tSamFreq[ 4] 44100
  370. tSamFreq[ 5] 48000
  371. Endpoint Descriptor:
  372. bLength 9
  373. bDescriptorType 5
  374. bEndpointAddress 0x85 EP 5 IN
  375. bmAttributes 5
  376. Transfer Type Isochronous
  377. Synch Type Asynchronous
  378. Usage Type Data
  379. wMaxPacketSize 0x0126 1x 294 bytes
  380. bInterval 4
  381. bRefresh 0
  382. bSynchAddress 0
  383. AudioControl Endpoint Descriptor:
  384. bLength 7
  385. bDescriptorType 37
  386. bDescriptorSubtype 1 (EP_GENERAL)
  387. bmAttributes 0x01
  388. Sampling Frequency
  389. bLockDelayUnits 2 Decoded PCM samples
  390. wLockDelay 0 Decoded PCM samples
  391. Interface Descriptor:
  392. bLength 9
  393. bDescriptorType 4
  394. bInterfaceNumber 3
  395. bAlternateSetting 0
  396. bNumEndpoints 1
  397. bInterfaceClass 3 Human Interface Device
  398. bInterfaceSubClass 0 No Subclass
  399. bInterfaceProtocol 0 None
  400. iInterface 0
  401. HID Device Descriptor:
  402. bLength 9
  403. bDescriptorType 33
  404. bcdHID 1.01
  405. bCountryCode 0 Not supported
  406. bNumDescriptors 1
  407. bDescriptorType 34 Report
  408. wDescriptorLength 66
  409. Report Descriptors:
  410. ** UNAVAILABLE **
  411. Endpoint Descriptor:
  412. bLength 7
  413. bDescriptorType 5
  414. bEndpointAddress 0x82 EP 2 IN
  415. bmAttributes 3
  416. Transfer Type Interrupt
  417. Synch Type None
  418. Usage Type Data
  419. wMaxPacketSize 0x0040 1x 64 bytes
  420. bInterval 4
  421. Device Qualifier (for other device speed):
  422. bLength 10
  423. bDescriptorType 6
  424. bcdUSB 2.00
  425. bDeviceClass 0 (Defined at Interface level)
  426. bDeviceSubClass 0
  427. bDeviceProtocol 0
  428. bMaxPacketSize0 64
  429. bNumConfigurations 1
  430. Device Status: 0x0001
  431. Self Powered
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