I am planning on building a weka classifier for my own perception of the relative loudness of these different signals, using known correct or missmatched levels as output class, to classify films or track-sets. Another possible approach for too loud or not classification is to rate the goodness/correctness of the balance between levels in a bounded scale (0 to 5 stars/points, 0 to 10, or similar approach). But for any of these to properly function I need some objective FEATURES from the audio tracks and their relative characteristics.