function D = initialisation_notes(chemins_notes_piano, n_fenetre, n_decalage, fenetre)

    D = [];

    for i = 1:length(chemins_notes_piano)

        chemin = chemins_notes_piano{i};
        [y, f_ech] = audioread(chemin);

        Y = TFCT(y, f_ech, n_fenetre, n_decalage, fenetre);
        S = abs(Y);

        D = [ D mean(S, 2) ];

    end

end