Connect all MIDI inputs to all MIDI outputs (except themselves). Supports multi-port devices

connectall.rb

#!/usr/bin/ruby

t = `aconnect -i -l`
$devices = {}
$device = 0
t.lines.each do |l|
  match = /client (\d*)\:((?:(?!client).)*)?/.match(l)
  # we skip empty lines and the "Through" port
  unless match.nil? || match[1] == '0' || /Through/=~l
    $device = match[1]
    $devices[$device] = []
  end
  match = /^\s+(\d+)\s/.match(l)
  if !match.nil? && !$devices[$device].nil?
    $devices[$device] << match[1]
  end
end

$devices.each do |device1, ports1|
  ports1.each do |port1|
    $devices.each do |device2, ports2|
      ports2.each do |port2|
        # probably not a good idea to connect a port to itself
        unless device1 == device2 && port1 == port2 
          system "aconnect #{device1}:#{port1} #{device2}:#{port2}"
        end
      end
    end
  end
end

Interesting. The 3rd and 4th ports of my interface seem to be ignored by the script. Its a Nektar Midiflex. I can still manually connect them to devices via qjackctl though. Perhaps it's a hardware issue..?

Maybe they show up differently in the aconnect list that we are parsing here. Would you mind posting the output of aconnect -i -l?

Sure, here -
aconnect -i -l
client 0: 'System' [type=kernel]
0 'Timer '
1 'Announce '
client 14: 'Midi Through' [type=kernel]
0 'Midi Through Port-0'
client 16: 'MIDIFlex4' [type=kernel,card=0]
0 'MIDIFlex4 MIDI 1'
Connecting To: 16:1, 20:0, 32:0, 32:1
Connected From: 16:1, 20:0, 32:0, 32:1
1 'MIDIFlex4 MIDI 2'
Connecting To: 16:0, 20:0, 32:0, 32:1
Connected From: 16:0, 20:0, 32:0, 32:1
client 20: 'Craft Synth 2.0' [type=kernel,card=1]
0 'Craft Synth 2.0 MIDI 1'
Connecting To: 16:0, 16:1, 32:0, 32:1
Connected From: 16:0, 16:1, 32:0, 32:1
client 32: 'Launchpad X' [type=kernel,card=4]
0 'Launchpad X MIDI 1'
Connecting To: 16:0, 16:1, 20:0, 32:1
Connected From: 16:0, 16:1, 20:0, 32:1
1 'Launchpad X MIDI 2'
Connecting To: 16:0, 16:1, 20:0, 32:0
Connected From: 16:0, 16:1, 20:0, 32:0

I think the problem might be that the input ports on the device do not match the number of output ports but I might be mistaken. I'd have to debug that again and try to replicate the issue. Sorry if this is taking a long time

Has anyone had a Roland TB-03 working with their hub? When I run aconnect -l it can see the device and it's connected but I can't seem to access it from any of my other devices.