BTW. I want to ask you guys. Did you have some circuit with microcontroller (pic or atmel) and LCD for spectrum analysier. something really good ?
Something like spectrum analyser in winamp in main window, with options and some modes
there are alot of avaible programs that do the job of the spectrum analyzer in the audio range with out any additional circuits...
just plug in ur pc and analyze!!
"Sure, a DSP can make the calculations and generate the pixel bitmap for an audio spectrum analyzer, but at what cost? Robert gets the same result from a single PIC processor with a design so good he walked away with a Design98 first prize."
**broken link removed**
May be even simpler with a current AVR flash based MCU...