If you only have one sound card installed on your PC, Beyond TV will automatically skip this step.
While Beyond TV 3.5 uses the TV tuner card to capture video for recordings and live TV, it uses your computer's sound card to capture all audio. Select the sound card Beyond TV will use to record audio. If there are multiple options in the list, ensure that you select the sound card connected to your TV tuner card. See the Connecting Audio Source document for help with connecting your sound card.
Note: Some tuner cards capture the audio for you, meaning that the sound card is not needed. If this is the case, Beyond TV will skip this step automatically.