> Is there any midi module options for channels ? > I become crazy, old keyboards seems uncompatible with linux > midi input while new keyboards can always communicate with > the old ones. Please ensure that there is MIDI data at the end of the cable you connect to the computer. There are no different MIDI standards, at least not for note on and off events. I bet there's not MIDI data coming to the MIDI in of the computer for whatsoever reason. Best regards ce