[sdiy] Making an audio spectrum analyzer from an old Casio LCD TV

[aankrom]

 I have an old hand-held Casio LCD TV and I thout it would be cool to 
 make an add-on for it that would allow it to function like a spectrum 
 analyzer. I was going to start with some sort of heterodyne system for 
 the fron't end, but getting the final output to NTSC video is the 
 insurmountable hurtle. It can be monochrome so I don't have to mess with 
 color. I've seen projects using microcontrollers that output VGA, but I 
 like my little TV idea.

 If I'm not mistaken would the easiest way to do it be to have the TV on 
 it's side?

 Anyone done anything like this?

 AA