this is a very simple form for midi interphase .. and VERY cheap
    
in your local electronic store you can get the stuff for about 100DKR
and then you have your own midi interphaze :)
 
the shopping list:
 
2 X DIN 5pin Male
      _ 
220 _( )_ 0.4w 5%
      _
8k2 _( )_
      _
1k  _( )_
 
+n35 ic .. or the 4N35
 
and the last thing a RS - 232 (serial port female plug)
  
stay restless ,, :) rst 1995 - 96 .. the diagram are stolen from a person
wich name is A.J Pomar 
 
and for your knowledge theres over 30 amiga progs that i know of that has
MIDI support ..so ..buy the gear and get electrifi'd