What "linguistic sources" would those be? When making suggestions of that kind, you really need to cite proper references, if only to prevent people from quoting, later on, what you have said as if it were proven "fact" (which will happen); an awful lot of misinformation is spread around that way, I'm afraid.

When you say "the older melody", which one do you mean? There are quite a few. Don't take my questions amiss; they are intended only to try to ensure that we have a reasonable consensus on what we are talking about.