Edirol PC-50
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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 /proc/asound/cards and 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.
Retrieved from "http://alsa.opensrc.org/Edirol_PC-50"