What compensating feature must a DTV-to-analog decoder adjust apart from program loudness adjustments and DRC?

The correct answer is associated with the need for a DTV-to-analog decoder to manage audio configurations effectively. Down mixing to a single audio signal is crucial when converting digital television audio to a format suitable for analog systems. Digital audio formats may consist of multiple channels (like 5.1 surround sound), and analog systems typically use a mono or stereo output.

By down mixing these multiple audio channels into a single or dual output, the decoder ensures that all audio content is delivered consistently and accurately to the listener, regardless of the limitations of the playback equipment. This process is important for maintaining audio clarity and balance when transitioning between different formats.

In contrast, the other options, while related to video or picture quality, do not pertain directly to the core task of adapting audio signals for analog compatibility. Adjusting video aspect ratios, color synchronization, and light intensity primarily address visual output rather than the essential audio processing required from a DTV-to-analog decoder.