void wb_button_clicked(int channel_number);
void set_transition_names(std::vector<std::string> transition_names);
void update_channel_name(Mixer::Output output);
+ void gain_staging_knob_changed(int value);
void cutoff_knob_changed(int value);
void limiter_threshold_knob_changed(int value);
void compressor_threshold_knob_changed(int value);