From the ALSA wiki
This is a 4 octave (49 velocity sensitive keys) midi controller keyboard with integrated USB interface and a single MIDI-out port.
I have tested this under Mandriva 2007 (kernel 2.6.17, alsa 1.0.12) and it works fine, it's completely plug-n-play, no manual configuration necessary.
Here is the
amidi -l output (see card 1):
# more /proc/asound/cards 0 [M2x2 ]: USB-Audio - Midisport 2x2 Midiman Midisport 2x2 at usb-0000:01:0a.0-1, full speed 1 [PC50 ]: USB-Audio - PC-50 EDIROL PC-50 at usb-0000:00:07.2-1, full speed # amidi -l Dir Device Name IO hw:0,0,0 Midisport 2x2 MIDI 1 IO hw:0,0,1 Midisport 2x2 MIDI 2 IO hw:1,0,0 PC-50 MIDI 1
This keyboard has a 'Advanced Driver' switch on the side to enable/disable FPT (Fast Processing Technology), some Roland/Edirol feature they claim is used to make effective use of the USB bandwith according to the amount of MIDI data transmitted.
I have tested it both with FPT on or off and it seems to work fine either way under Linux.