  The harmonic quarks and their complete oscillators are presenting the
unprecedented exact solution for the mass spectrum of mesons with an explicit
charm. The experimental and calculated spectrums coincide with standard
deviation in 1.8 MeV. The four doublets and experimental errors of meson masses
give the main contribution in this value. The harmonic spectrum is not
sensitive to an isospin. The spectrum is simple, complete, precise and
logically clear. It's easy to make predictions. The spectrum has not free
parameters. It's supposed that the spectrum of harmonic and mixed levels is an
exterior spectrum of allowed energy states in relation to a QCD states. The
features of the harmonic spectrum, some levels of charm hadrons, the acceptor
property of a c-quark, the mass rank of quarks and the nature of leptons are
discussed.
