lsusb -v

------------------

Bus 004 Device 006: ID 0499:103c Yamaha Corp. MOTIF-RACK ES
Device Descriptor:
  bLength                18
  bDescriptorType         1 
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x0499 Yamaha Corp.
  idProduct          0x103c MOTIF-RACK ES
  bcdDevice            1.00
  iManufacturer           1 YAMAHA Corporation
  iProduct                2 YAMAHA MOTIF-RACK ES
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          117
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol    255 
      iInterface              0 
      ** UNRECOGNIZED:  07 24 01 00 01 63 00
      ** UNRECOGNIZED:  06 24 02 02 01 00
      ** UNRECOGNIZED:  09 24 03 02 01 01 01 01 00
      ** UNRECOGNIZED:  09 24 03 02 02 01 01 01 00
      ** UNRECOGNIZED:  09 24 03 02 03 01 01 01 00
      ** UNRECOGNIZED:  09 24 03 02 04 01 01 01 00
      ** UNRECOGNIZED:  09 24 03 02 05 01 01 01 00
      ** UNRECOGNIZED:  09 24 03 02 06 01 01 01 00
      ** UNRECOGNIZED:  09 24 03 02 07 01 01 01 00
      ** UNRECOGNIZED:  09 24 03 02 08 01 01 01 00
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
Device Status:     0x0001
  Self Powered

------------------
# amidi -l
Dir Device    Name
IO  hw:2,0,0  YAMAHA MOTIF-RACK ES MIDI 1
 O  hw:2,0,1  YAMAHA MOTIF-RACK ES MIDI 2
 O  hw:2,0,2  YAMAHA MOTIF-RACK ES MIDI 3
 O  hw:2,0,3  YAMAHA MOTIF-RACK ES MIDI 4
 O  hw:2,0,4  YAMAHA MOTIF-RACK ES MIDI 5
 O  hw:2,0,5  YAMAHA MOTIF-RACK ES MIDI 6
 O  hw:2,0,6  YAMAHA MOTIF-RACK ES MIDI 7
 O  hw:2,0,7  YAMAHA MOTIF-RACK ES MIDI 8