umidi —
USB support for MIDI devices
umidi* at uhub?
midi* at umidi?
The umidi driver supports USB MIDI devices that conform
  to the Universal Serial Bus Device Class Definition for MIDI
  Devices. Vendor-specific support is also included for the following:
  - Fantom-X
-  
- PC300
-  
- PCR
-  
- SC8820
-  
- SC8850
-  
- SCD70
-  
- SD20
-  
- SD80
-  
- SD90
-  
- SK500
-  
- SonicCell
-  
- U8
-  
- UA25
-  
- UA100
-  
- UA101
-  
- UA10F
-  
- UA4FX
-  
- UA700
-  
- UA1000
-  
- UM1
-  
- UM2
-  
- UM3
-  
- UM4
-  
- UM550
-  
- UM880N
-  
- XV5050
-  
 
  - UX256
- (product-specific support)
- Others
- Other Yamaha MIDI devices will be attached and are expected to work
    also.
 
Devices supported by the umidi driver will
    appear as midi(4) devices.
The umidi driver appeared in NetBSD
  1.6.