Fresh SD Debian Stretch on Pi 3 then 3.0.1 an Roland Go:Keys


I have this code with sonic-pi from a Raspberry Pi 3 with fresh install of Stretch and Sonic Pi 3.0.1.

# Welcome to Sonic Pi v3.0.1

live_loop :midi_piano do
  note, velocity = sync "/midi/go:keys_midi_1/0/1/note_on"
  synth :piano, note: note, amp: velocity / 127.0

I assume the system is swamped with MIDI clocks and becomes unresponsive until I unplug the Roland Go:Keys 61k with V.1.21 firmware for Scratch support.

The Go:keys has some unusual MIDI implementation features and Roland is not revealing them.
I have been succesfully testing on Ubuntu Studio 17.10 with Rosegarden and other MIDI tools.

When I connected it to the Raspberry Pi 3 running Sonic Pi 3.0.1 the CUE window filled with
I have also seen the keyboard generate 5 channels of MIDI note on / off events when put into LOOP MIX
Also each of the 8 instrument groups buttons select a separate MIDI channel.

Who knows if this is a typical MIDI implementation or going to be a beast to support ?