what is "pitchy"
I don't know, but I think it has to do with "Song Selection" :)
"pitchy" is missing notes by a little bit -- a little bit under or a little bit over.
Brass players and singers often have better ears to hear "pitchiness" (overall) although lots of people can hear it as well.
Frequently, loud singing overcomes "pitchiness" since the sound waves are longer and mask the missed notes.