Perfect-Pitch Perception

What words do you use when you want to sing a song but don't remember its lyrics? Lalala? Something, something? Mmm?

I usually sing with the pitch names.
Yes, I am a perfect-pitch person. :-)
Each instrumental note sounds with its Italian pitch name, such as Do, Re, or Mi, to me.
It sounds as if the pitch names were the lyrics of the song.

When people listen to music, they generally use only the auditory area in their brain; on the other hand, the pitch percept by perfect-pitch people is executed both in the auditory area and the language area!
It can be said that they regard music as a kind of languages.

When it comes to vocal music, the pitch names sound less prominent
to me.
I think it's because I unconsciously regard the lyrics, which has meanings, as more important information than the pitch names.

It is natural that people prioritize the lyrics over the pitch names.
Suppose, for instance, you hear two language at the same time, and one is your mother tongue and the other is a foreign language.
I guess you can easily recognize what was said in your mother tongue, but it's hard to catch the other one.
It's the information choice: you unconsciously choose the information that is more relevant to you, or that requires less efforts to understand.
It is obvious that the lyrics have higher importance than the pitch names for songs, so they make less effort to catch pitch names.


Well, I think I'm writing too much today, so I'm going to stop here.
I'm not sure if I wrote what I wanted to say logically... x(
Any candid comments would be greatly appreciated!!