9 Computer software for recording, playing back, and enhancing audio data; computer software for recognizing speech or voice from audio data; computer software for identifying a person using audio data; computer software for enhancing audio quality for use in audio playback systems, audio recording systems, audio transmission systems, voice processing systems, speech enhancement systems, and speech recognition systems; computer software for enhancing audio quality for use in applications and devices using voice control, voice processing, speech enhancement and speech recognition technology; apparatus for recording, transmitting, or reproducing sound; apparatus for identifying a person using audio data, namely, computer hardware and electronic devices comprised of microphones and digital sound processors; apparatus for enhancing audio quality, namely, audio recorders; apparatus for enhancing audio quality, namely, audio playback systems comprised of loudspeakers, microphones, and audio interfaces; apparatus for enhancing audio quality, namely, audio transmission systems comprised of audio receivers, loudspeakers, microphones, and audio interfaces; apparatus for enhancing audio quality, namely, voice processing systems comprised of computer hardware, loudspeakers, microphones, and audio interfaces; apparatus for enhancing audio quality, namely, speech recognition systems comprised of computer hardware, loudspeakers, microphones, and audio interfaces