The present invention comprises a new class of compounds useful for the modulation of Beta-secretase enzyme activity and for the treatment of Beta-secretase mediated diseases, including Alzheimer’s disease and related conditions. The indicator has a base member having a window formed in the top surface that communicates with a channel formed in the bottom surface. The current performance indication of the investment vehicle is matched to a predetermined audible signature. Subsequently, a second data sequence is received to be stored on a second data track of the recording media, the second data track being adjacent to the first data track.