Thanks so far for a lot of information, but there are things I don't get; for instance, if A=440hz then how can I sing A=335 and be offkey, why isn't 335 some other note? Also, I can't sing harmony because I can't sing, I sing ALONG. I can only sing harmony, that is, if harmony has been sung (to wit, I can sing along with the memory of a song, and thus appear to be singing.) I sing really well, say some people, and when singing from memory can sing in a manner that allows the song to be sung within my range without having people cringe. Used to be I could do that and people who could sing would cringe (nobody in my family, so no models, quoi). When they cringe, I'm offkey, (they say), when they don't cringe I must have "transposed" into a key I can sing in?? Is that what I can do without knowing it? But when actually hearing it, the artist "starts off too low" and I run into trouble somewhere.

Using the piano (which I don't of course play) as an example, I can start picking out a song I know, and then get to a note that doesn't exist on the keyboard; I thn know I've started "wrong" and try again, and get it OK. But I don't necessarily hear it as wrong till I do it right, and then I can hear that it's flat or sharp (my initial attempt). To digress slightly, I assume I don't have perfect pitch from that, is that in any way related?