  The Cosmic Microwave Background (CMB) anisotropies measurements can provide
many clues about the Universe. Although the common belief is that they will
allow a very precise measurement of the cosmological parameters (that is, the
current state of the Universe), they will alternatively give interesting
informations about the state of the initial perturbations (that is, the state
of the Universe at the end of inflation). In this paper, we study the
observational consequences on the CMB anisotropies of some wide set of inital
conditions, with a correlated mixture of adiabatic and isocurvature
perturbations.
