void set_transition_names(std::vector<std::string> transition_names);
void update_channel_name(Mixer::Output output, const std::string &name);
void update_channel_color(Mixer::Output output, const std::string &color);
void gain_staging_knob_changed(unsigned bus_index, int value);
void final_makeup_gain_knob_changed(int value);
void cutoff_knob_changed(int value);
void set_transition_names(std::vector<std::string> transition_names);
void update_channel_name(Mixer::Output output, const std::string &name);
void update_channel_color(Mixer::Output output, const std::string &color);
void gain_staging_knob_changed(unsigned bus_index, int value);
void final_makeup_gain_knob_changed(int value);
void cutoff_knob_changed(int value);