void setup_audio_miniview();
void setup_audio_expanded_view();
bool eventFilter(QObject *watched, QEvent *event) override;
+ void closeEvent(QCloseEvent *event) override;
void set_white_balance(int channel_number, int x, int y);
void update_cutoff_labels(float cutoff_hz);
void update_eq_label(unsigned bus_index, EQBand band, float gain_db);