Cepstral Pitch Tracker

        };

        typedef std::vector<Estimate> Estimates;

        ~Hypothesis();

        enum State {

            Provisional,

            Satisfied,

            Rejected,

        };

        bool test(Estimate);

        State getState();

        Estimates getAcceptedEstimates();

    typedef std::vector<Hypothesis> Hypotheses;

    Hypotheses m_possible;

    double **m_history;