hmmmmmm.. correct me if i´m wrong.. but everyone i know always kept telling me, that this perfect pitch thing is a gift of birth and that it cannot be learned. those peeps can even tell the pitch of a car-door slammed shut.
afaik those peeps do see colors in their head when they concentrate on a sound. and from those colors they tell the pitch - sortof like "dark red is f#"...... i know about beeing able to develop your ear to a good relative pitch... but to perfect pitch?.. hmmmmmmmmmmmsss i´m not sure.