I too think it would be cool unfortunately I'm not knowledgeable in cable making.
The gamecube outputs both digital video and digital audio.
Nintendo's only support was a component cable, which while better than composite is still an analog signal.
sure the audio wasn't mastered in anything better than pro logic II but there is something great about having the signal in pure digital with zero degradation provided your cable is good.
the ntsc and pal gamecubes have different ports on the back, I have heard that the pal gamecube gives both the digital and analog via one port where as the ntsc gamecube has two separate ports.
more over, newer gamecubes have no digital out port so you have to have an older gamecube.
here are some resources I found.http://archive2.avsforum.com/avs-vb/.../t-708162.html
I PMed the guy who was offering to make them back then and he gave me this response.
I gave up on the gamecube a long time ago because there's no source for the digital/analog converter chip used in the official GC component video cable.
it's certainly possible to reverse-engineer it and build a converter to DVI/HDMI, but I doubt anyone cares enough to put in the effort given that the Wii can play GC games
he is a regular here and feel free to contact him but I am sure you will get the same response, he is not interested in it any more.
The thing is that while the wii does play gamecube games, it actually is inferior to the gamecube as far as playing gamecube games because it has no digital output, where as the gamecube does.http://www.gamesx.com/wiki/doku.php?...tendodigitalav
and from the same site a diagram on the audio part of the signal that comes out from that port, which is said could be converted to a digital audio out like toslink or the like.http://gamesx.com/wiki/doku.php?id=av:nintendogcda
people have also speculated on what kind of port that is on the gamecube anyways, some have thought that it is the japanese D-Terminal seen herehttp://en.wikipedia.org/wiki/D4_video_connector
but I believe that is incorrect because I don't count the same number of pins. Anyways, any research that you guys find would be greatly appreciated.
I really think the best things we could do would try for several things
either a high quality digital DVI or HDMI cable for the video output
and a Fiber Optic Digital audio cable or HDMI cable for the audio.
keep me posted on your latest research.