void plot_peak (wxGraphicsPath &, int, Metrics const &) const;
void plot_rms (wxGraphicsPath &, int, Metrics const &) const;
float y_for_linear (float, Metrics const &) const;
void plot_peak (wxGraphicsPath &, int, Metrics const &) const;
void plot_rms (wxGraphicsPath &, int, Metrics const &) const;
float y_for_linear (float, Metrics const &) const;