1What: /config/usb-gadget/gadget/functions/midi.name 2Date: Nov 2014 3KernelVersion: 3.19 4Description: 5 The attributes: 6 7 index - index value for the USB MIDI adapter 8 id - ID string for the USB MIDI adapter 9 buflen - MIDI buffer length 10 qlen - USB read request queue length 11 in_ports - number of MIDI input ports 12 out_ports - number of MIDI output ports 13