Christian Bunge wrote: > /dev/snd/midiC1D0 is my first virtual midiport In theory, this is an internal file, and you are supposed to use /dev/midi01 instead. In practice, it doesn't matter. :) > then I connect 72:0 to 80:2 (external keyboard) but I can't hear any sound > from Spiralsynth when I play on the keyboard. > 72:0 Virtual Raw MIDI 1-0 VirMIDI 1-0 > 80:2 MidiSport 4x4 MidiSport 4x4 Port 2 If you run "aconnect 72:0 80:2", all data written to /dev/midi01 will be sent to the third output port of the 4x4. To send data in the other direction, use "aconnect 80:2 72:0". HTH Clemens