QComboBox _sample_rate_list;
QAction *_sample_rate_list_action;
QDoubleSpinBox _sample_rate_value;
QAction *_sample_rate_value_action;
QComboBox _sample_rate_list;
QAction *_sample_rate_list_action;
QDoubleSpinBox _sample_rate_value;
QAction *_sample_rate_value_action;