Hello I installed linux mint 16 petra I connected via usb my sound card steinberg mi4.jackaudio I do not detect midi in and midi out of the card audio.come can I do?
Audacity does not support MIDI in or MIDI out. Neither recording or playback of MIDI are supported.
http://manual.audacityteam.org/o/man/faq_opening_and_saving_files.html#midi
http://wiki.audacityteam.org/wiki/Midi
If you need MIDI for other programs, you may be out of luck with the Steinberg mi4. All that I have found from searching Google are reports that MIDI on the mi4 does not work on Linux. I don’t think that Linux is to blame for this - apparently it doesn’t work on Windows either until you install special drivers from Steinberg (http://www.steinberg.net/en/support/unsupported_products/cubase_system4_mi4.html). Steinberg do not provide drivers for Linux for this device.