FLAC can use polynomials or lpc, as described in the article. I'm curious if you'd gain anything by doing an mdct and then modeling in the frequency domain and

FLAC can use polynomials or lpc, as described in the article. I'm curious if you'd gain anything by doing an mdct and then modeling in the frequency domain and then storing the residuals... Lots of the frequency channels will usually have much lower energy, so the residuals wind up being easier to store.