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I have a roll up piano (see the image) that has an USB output.

An USB cable comes with it: it is able to connect the roll up piano with the computer.

Is there any way to record MIDI using the roll up piano, the USB cable and the computer (that runs Ubuntu)? Is a MIDI cable really required if I have the USB one?

What are the steps to record MIDI on Ubuntu using the roll up piano and the USB cable?

The output of arecordmidi -l:

# no cable is connected (after fresh restart)
$ arecordmidi -l
 Port    Client name                      Port name
 14:0    Midi Through                     Midi Through Port-0

# USB only
$ arecordmidi -l
 Port    Client name                      Port name
 14:0    Midi Through                     Midi Through Port-0
 24:0    USB MIDI Interface               USB MIDI Interface MIDI 1

# MIDI only
$ arecordmidi -l
 Port    Client name                      Port name
 14:0    Midi Through                     Midi Through Port-0

# USB & MIDI
$ arecordmidi -l
 Port    Client name                      Port name
 14:0    Midi Through                     Midi Through Port-0
 24:0    USB MIDI Interface               USB MIDI Interface MIDI 1

I tried to use QJackCtl and some other applications to make the connections:

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  • What is the output of arecordmidi -l?
    – CL.
    Dec 15, 2013 at 17:50
  • @CL. I bought a MIDI cable. Please see the edit. Apr 9, 2014 at 19:25
  • Does aseqdump -p 20:0 show anything? If yes, just run a sequencer.
    – CL.
    Apr 9, 2014 at 19:28
  • @CL. No... Just Waiting for data. Press Ctrl+C to end., but no output when pressing the keys. Hey, are you Clemens Ladisch, the creator of arecordmidi? :-) If you solve my problem, I will give you more points! :-D Apr 10, 2014 at 14:17
  • Did you connect the keyboard's output to the interface's input? Why aren't you just using the USB cable?
    – CL.
    Apr 10, 2014 at 14:43

1 Answer 1

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The type of program that allows you to record MIDI data is called a sequencer; try Rosegarden, Seq24, or Qtractor.

Your piano can be connected with either the USB cable or a MIDI cable.

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