Pre-downloaded software for noise reduction, sound quality, sound transmission, sound control, and sound effect optimization for sound recording and playback in hearing aids, headphones, earbuds, headsets, speakers, and projectors; Multiprocessor chips containing pre-downloaded software for noise reduction, sound quality, sound transmission, sound control, and sound effect optimization for sound recording and playback contained hearing aids, headphones, earbuds, headsets, speakers, and projec...