Heres a little piece of harware you can make in about a night.
          VERY Low cost Circuit using parts easily obtainable in North America 
          Includes Foil Diagrams. For $20 (incl. cabling) you cant beat it! :)     
             
          -BD/SwG-

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  192     450  42.7% -lh5- aa2c Feb  6  1980 FileID.diz
[generic]                 2855    5826  49.0% -lh5- 4e92 Feb  6  1980 midibox.doc
[generic]                 2491    6706  37.1% -lh5- c038 Dec 14  1997 Midibox.iff
[generic]                 4551   11562  39.4% -lh5- c9d4 Jan 13  1980 Midiboxpat.iff
[generic]                  276     446  61.9% -lh5- 66ba Feb  6  1980 SwG-MboX.readme
[generic]                22414   22414 100.0% -lh0- e1f7 Aug  7  1990 SwG.gif
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         6 files   32779   47404  69.1%            Mar  1  1998