-FLUIDSYNTH_API void fluid_voice_add_mod(fluid_voice_t* voice, fluid_mod_t* mod, int mode);
-FLUIDSYNTH_API void fluid_voice_gen_set(fluid_voice_t* voice, int gen, float val);
-FLUIDSYNTH_API float fluid_voice_gen_get(fluid_voice_t* voice, int gen);
-FLUIDSYNTH_API void fluid_voice_gen_incr(fluid_voice_t* voice, int gen, float val);
+FLUIDSYNTH_API void fluid_voice_add_mod(fluid_voice_t *voice, fluid_mod_t *mod, int mode);
+FLUIDSYNTH_API float fluid_voice_gen_get(fluid_voice_t *voice, int gen);
+FLUIDSYNTH_API void fluid_voice_gen_set(fluid_voice_t *voice, int gen, float val);
+FLUIDSYNTH_API void fluid_voice_gen_incr(fluid_voice_t *voice, int gen, float val);
+
+FLUIDSYNTH_API unsigned int fluid_voice_get_id(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_get_channel(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_get_key(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_get_actual_key(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_get_velocity(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_get_actual_velocity(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_is_playing(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_is_on(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_is_sustained(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_is_sostenuto(const fluid_voice_t *voice);
+FLUIDSYNTH_API int fluid_voice_optimize_sample(fluid_sample_t *s);
+FLUIDSYNTH_API void fluid_voice_update_param(fluid_voice_t *voice, int gen);