Crystals whose structures lack both inversion and mirror symmetries are chiral. Some of their phonon modes, known as chiral phonons, exhibit energy splittings associated with the internal angular momenta referred to as crystal (or pseudo-) angular momentum (CAM/PAM). In this talk, I address a simple yet fundamental question: what is a concise indicator that quantifies these splittings and directly reflect lattice chirality? To this end, we construct minimal models of lattice dynamical matrices with single and multiple chiral axes and analyze phonon dynamics while continuously tuning the degree of lattice chirality.