[使用ツール]：usbmon-0.50
[接続したUSBデバイス商品名]：MIDIキーボード
[接続したUSBデバイス型式]：PCR-M50
[Device Descriptor]
  bLength ..................... 18
  bDescriptorType ............. 0x01 (Device)
  bcdUSB ...................... 0x0110 (release 1.10)
  bDeviceClass ................ 0xff (vendor-specific)
  bDeviceSubClass ............. 0x00 (at interface level)
  bDeviceProtocol ............. 0xff (vendor-specific)
  bMaxPacketSize0 ............. 64
  idVendor .................... 0x0582
  idProduct ................... 0x0033
  bcdDevice ................... 0x0100
  iManufacturer ............... 1
  iProduct .................... 2
  iSerialNumber ............... 0
  bNumConfigurations .......... 1
[Configuration Descriptor]
  bLength ..................... 9
  bDescriptorType ............. 0x02 (Configuration)
  wTotalLength ................ 55
  bNumInterfaces .............. 1
  bConfigurationValue ......... 1
  iConfiguration .............. 0
  bmAttributes ................ 0x80 (Bus-powered)
  bMaxPower ................... 150 (300mA)
[Interface Descriptor]
  bLength ..................... 9
  bDescriptorType ............. 0x04 (Interface)
  bInterfaceNumber ............ 0
  bAlternateSetting ........... 0
  bNumEndpoints ............... 2
  bInterfaceClass ............. 0xff (vendor-specific)
  bInterfaceSubClass .......... 0x03 (Unknown)
  bInterfaceProtocol .......... 0x00 (None)
  iInterface .................. 0
[EndPoint Descriptor]
  bLength ..................... 7
  bDescriptorType ............. 0x05 (EndPoint)
  bEndpointAddress ............ 0x01 (OUT, Endpoint = 1)
  bmAttributes ................ 0x02 (Bulk)
  wMaxPacketSize .............. 64
  bInterval ................... 0
[EndPoint Descriptor]
  bLength ..................... 7
  bDescriptorType ............. 0x05 (EndPoint)
  bEndpointAddress ............ 0x82 (IN, Endpoint = 2)
  bmAttributes ................ 0x02 (Bulk)
  wMaxPacketSize .............. 64
  bInterval ................... 0
[Interface Descriptor]
  bLength ..................... 9
  bDescriptorType ............. 0x04 (Interface)
  bInterfaceNumber ............ 0
  bAlternateSetting ........... 1
  bNumEndpoints ............... 2
  bInterfaceClass ............. 0xff (vendor-specific)
  bInterfaceSubClass .......... 0x03 (Unknown)
  bInterfaceProtocol .......... 0x00 (None)
  iInterface .................. 0
[EndPoint Descriptor]
  bLength ..................... 7
  bDescriptorType ............. 0x05 (EndPoint)
  bEndpointAddress ............ 0x01 (OUT, Endpoint = 1)
  bmAttributes ................ 0x02 (Bulk)
  wMaxPacketSize .............. 64
  bInterval ................... 1
[EndPoint Descriptor]
  bLength ..................... 7
  bDescriptorType ............. 0x05 (EndPoint)
  bEndpointAddress ............ 0x82 (IN, Endpoint = 2)
  bmAttributes ................ 0x03 (Interrupt)
  wMaxPacketSize .............. 64
  bInterval ................... 1 (1ms)

[意見・感想など]
USB接続のMIDIキーボードです。単体の鍵盤として、MIDIケーブルで音源に繋いで
使うことも出来ます。USB接続時は、USB-MIDI I/F としても機能します。
商品リンク･･･ http://www.roland.co.jp/products/dtm/PCR-M.html