Downloadable software and audio reproduction and processing hardware for audio signal processing, namely, acoustic correction, acoustic space measurement, analysis, equalizing, and calibration; downloadable software and audio reproduction and processing hardware for generating, measuring, analyzing, recording, amplifying, receiving and playing audio signals, digital music files and sounds; downloadable computer software and audio reproduction and processing hardware for transducer analysis, namely, transducer measurement, transducer equalizing, and transducer calibration; downloadable software and audio reproduction and processing hardware for graphical visualization of audio properties; downloadable software and audio reproduction and processing hardware for testing and measuring audio signals and room acoustics; downloadable software and audio reproduction and processing hardware for mix translation of audio signals; audio transducers, namely, microphones