On your menu?. Try selecting another Audio Language in the Audio menu. For instance if you select French it will play the French track so if Descriptive Audio is named French by the broadcaster then your TV will play the French audio first always. Every Tv has a MTS or SAP or Audio key that switches between available audio tracks. I have my Samsung set at English and it plays all audio fine on all channels in the GTA, if I want the descriptive audio I have to press the MTS key on the remote.