+ double internal_to_user (double i) const { return accurate_coefficient_to_dB (i);}
+ double user_to_internal (double u) const { return dB_to_coefficient(u) ;}
+
+ std::string get_user_string () const
+ {
+ char theBuf[32]; sprintf( theBuf, "%3.1f dB", accurate_coefficient_to_dB (get_value()));
+ return std::string(theBuf);
+ }
+