Denemo is really lacking alsa support. Unfortunatly
Denemo has only
one coder who is working a full time job. Is there a kind soul out
there who could help implement ALSA support for Denemo. And if you
live nearby I would gladly buy you a beer of your choice :) thats if
you drink beer...
maybe
http://www.music.mcgill.ca/~gary/rtmidi/
is the right thing for you.
Best regards
ce