Interested in Language
We are learning new modes of attention — say, favoring the ear more than the eye — but so long as we work within the old attention-frame we find X boring ... e.g. listening for sense rather than sound (being too message-oriented).
I don't understand this part of the sentence. What is X? Could you explain me the meaning?
It's a placeholder for some unspecified activity -- the algebraic usage of X.