actually, i read this article on guitar world and in guitar legends that anyone can achieve perfect pitch by buying like 5 cds for like $160. it looks like a big scam! but, exactly how do you find out what key a song is in if you don't even know what notes are in the song? also, how long does it take people to memorize the notes on the fretboard 1-12? and why is it so important that people are able to sightread on the guitar instead of reading from tab?