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Jun 25th, 2022
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  1. Bus 001 Device 004: ID 08bb:27c4 Texas Instruments PCM2704C stereo audio DAC
  2. Device Descriptor:
  3. bLength 18
  4. bDescriptorType 1
  5. bcdUSB 1.10
  6. bDeviceClass 0
  7. bDeviceSubClass 0
  8. bDeviceProtocol 0
  9. bMaxPacketSize0 8
  10. idVendor 0x08bb Texas Instruments
  11. idProduct 0x27c4 PCM2704C stereo audio DAC
  12. bcdDevice 1.00
  13. iManufacturer 1 BurrBrown from Texas Instruments
  14. iProduct 2 USB AUDIO DAC
  15. iSerial 0
  16. bNumConfigurations 1
  17. Configuration Descriptor:
  18. bLength 9
  19. bDescriptorType 2
  20. wTotalLength 0x00be
  21. bNumInterfaces 3
  22. bConfigurationValue 1
  23. iConfiguration 0
  24. bmAttributes 0x80
  25. (Bus Powered)
  26. MaxPower 500mA
  27. Interface Descriptor:
  28. bLength 9
  29. bDescriptorType 4
  30. bInterfaceNumber 0
  31. bAlternateSetting 0
  32. bNumEndpoints 0
  33. bInterfaceClass 1 Audio
  34. bInterfaceSubClass 1 Control Device
  35. bInterfaceProtocol 0
  36. iInterface 0
  37. AudioControl Interface Descriptor:
  38. bLength 9
  39. bDescriptorType 36
  40. bDescriptorSubtype 1 (HEADER)
  41. bcdADC 1.00
  42. wTotalLength 0x0028
  43. bInCollection 1
  44. baInterfaceNr(0) 1
  45. AudioControl Interface Descriptor:
  46. bLength 12
  47. bDescriptorType 36
  48. bDescriptorSubtype 2 (INPUT_TERMINAL)
  49. bTerminalID 1
  50. wTerminalType 0x0101 USB Streaming
  51. bAssocTerminal 0
  52. bNrChannels 2
  53. wChannelConfig 0x0003
  54. Left Front (L)
  55. Right Front (R)
  56. iChannelNames 0
  57. iTerminal 0
  58. AudioControl Interface Descriptor:
  59. bLength 9
  60. bDescriptorType 36
  61. bDescriptorSubtype 3 (OUTPUT_TERMINAL)
  62. bTerminalID 2
  63. wTerminalType 0x0301 Speaker
  64. bAssocTerminal 0
  65. bSourceID 3
  66. iTerminal 0
  67. AudioControl Interface Descriptor:
  68. bLength 10
  69. bDescriptorType 36
  70. bDescriptorSubtype 6 (FEATURE_UNIT)
  71. bUnitID 3
  72. bSourceID 1
  73. bControlSize 1
  74. bmaControls(0) 0x01
  75. Mute Control
  76. bmaControls(1) 0x02
  77. Volume Control
  78. bmaControls(2) 0x02
  79. Volume Control
  80. iFeature 0
  81. Interface Descriptor:
  82. bLength 9
  83. bDescriptorType 4
  84. bInterfaceNumber 1
  85. bAlternateSetting 0
  86. bNumEndpoints 0
  87. bInterfaceClass 1 Audio
  88. bInterfaceSubClass 2 Streaming
  89. bInterfaceProtocol 0
  90. iInterface 0
  91. Interface Descriptor:
  92. bLength 9
  93. bDescriptorType 4
  94. bInterfaceNumber 1
  95. bAlternateSetting 1
  96. bNumEndpoints 1
  97. bInterfaceClass 1 Audio
  98. bInterfaceSubClass 2 Streaming
  99. bInterfaceProtocol 0
  100. iInterface 0
  101. AudioStreaming Interface Descriptor:
  102. bLength 7
  103. bDescriptorType 36
  104. bDescriptorSubtype 1 (AS_GENERAL)
  105. bTerminalLink 1
  106. bDelay 0 frames
  107. wFormatTag 0x0001 PCM
  108. AudioStreaming Interface Descriptor:
  109. bLength 17
  110. bDescriptorType 36
  111. bDescriptorSubtype 2 (FORMAT_TYPE)
  112. bFormatType 1 (FORMAT_TYPE_I)
  113. bNrChannels 2
  114. bSubframeSize 2
  115. bBitResolution 16
  116. bSamFreqType 3 Discrete
  117. tSamFreq[ 0] 32000
  118. tSamFreq[ 1] 44100
  119. tSamFreq[ 2] 48000
  120. Endpoint Descriptor:
  121. bLength 9
  122. bDescriptorType 5
  123. bEndpointAddress 0x02 EP 2 OUT
  124. bmAttributes 9
  125. Transfer Type Isochronous
  126. Synch Type Adaptive
  127. Usage Type Data
  128. wMaxPacketSize 0x00c0 1x 192 bytes
  129. bInterval 1
  130. bRefresh 0
  131. bSynchAddress 0
  132. AudioStreaming Endpoint Descriptor:
  133. bLength 7
  134. bDescriptorType 37
  135. bDescriptorSubtype 1 (EP_GENERAL)
  136. bmAttributes 0x00
  137. bLockDelayUnits 0 Undefined
  138. wLockDelay 0x0000
  139. Interface Descriptor:
  140. bLength 9
  141. bDescriptorType 4
  142. bInterfaceNumber 1
  143. bAlternateSetting 2
  144. bNumEndpoints 1
  145. bInterfaceClass 1 Audio
  146. bInterfaceSubClass 2 Streaming
  147. bInterfaceProtocol 0
  148. iInterface 0
  149. AudioStreaming Interface Descriptor:
  150. bLength 7
  151. bDescriptorType 36
  152. bDescriptorSubtype 1 (AS_GENERAL)
  153. bTerminalLink 1
  154. bDelay 0 frames
  155. wFormatTag 0x0001 PCM
  156. AudioStreaming Interface Descriptor:
  157. bLength 17
  158. bDescriptorType 36
  159. bDescriptorSubtype 2 (FORMAT_TYPE)
  160. bFormatType 1 (FORMAT_TYPE_I)
  161. bNrChannels 1
  162. bSubframeSize 2
  163. bBitResolution 16
  164. bSamFreqType 3 Discrete
  165. tSamFreq[ 0] 32000
  166. tSamFreq[ 1] 44100
  167. tSamFreq[ 2] 48000
  168. Endpoint Descriptor:
  169. bLength 9
  170. bDescriptorType 5
  171. bEndpointAddress 0x02 EP 2 OUT
  172. bmAttributes 9
  173. Transfer Type Isochronous
  174. Synch Type Adaptive
  175. Usage Type Data
  176. wMaxPacketSize 0x0060 1x 96 bytes
  177. bInterval 1
  178. bRefresh 0
  179. bSynchAddress 0
  180. AudioStreaming Endpoint Descriptor:
  181. bLength 7
  182. bDescriptorType 37
  183. bDescriptorSubtype 1 (EP_GENERAL)
  184. bmAttributes 0x00
  185. bLockDelayUnits 0 Undefined
  186. wLockDelay 0x0000
  187. Interface Descriptor:
  188. bLength 9
  189. bDescriptorType 4
  190. bInterfaceNumber 2
  191. bAlternateSetting 0
  192. bNumEndpoints 1
  193. bInterfaceClass 3 Human Interface Device
  194. bInterfaceSubClass 0
  195. bInterfaceProtocol 0
  196. iInterface 0
  197. HID Device Descriptor:
  198. bLength 9
  199. bDescriptorType 33
  200. bcdHID 1.00
  201. bCountryCode 0 Not supported
  202. bNumDescriptors 1
  203. bDescriptorType 34 Report
  204. wDescriptorLength 36
  205. Report Descriptors:
  206. ** UNAVAILABLE **
  207. Endpoint Descriptor:
  208. bLength 7
  209. bDescriptorType 5
  210. bEndpointAddress 0x85 EP 5 IN
  211. bmAttributes 3
  212. Transfer Type Interrupt
  213. Synch Type None
  214. Usage Type Data
  215. wMaxPacketSize 0x0001 1x 1 bytes
  216. bInterval 10
  217.  
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