When the selected partial for a note happens to be too weak to use for tuning, Montal Tuner can automatically select a stronger partial. When this happens, VoiceOver will announce the new partial. Automatic partial selection will only occur if it is enabled from the Settings screen. And even then, it will only apply to notes below C2. When you select the Auto Partial Enable button on the Settings page, VoiceOver will speak the current state of this switch. If you activate this button, the state of Auto Partial Enable will be toggled between ON and OFF.