Prediction begins with a vision of design goals and ends with a successfully optimized design. The speaker's vertical pattern and the room's section view are overlaid to analyze coverage. Horizontal plane coverage spans side/side and front/back. Acoustic modeling programs provide advance information about speaker performance in the space. Frequency resolution sets the layer count for the coverage plot series. Polar data are a circular or spherical series of evenly spaced points. The spacing is the angular resolution, in degrees. Phase response characterization adds significant complexity to the data interpretation. Common Loudspeaker Format (CLF) has been created in an effort to standardize acoustic modeling source files. MAPP Online is 2-D-only prediction with extremely high resolution and complex data. The acoustic properties of building materials are compiled into a table of absorption coefficient values over frequency. The direct-field response of a single speaker has the highest potential for accurate characterization, provided we have enough frequency and angular resolution.