DBX is a noise reduction system introduced in the 70s. It was a competitor to Dolby NR for home/professional use. Why noise reduction? Because audio tape by default is "hissy". You hear SSSSSSSSSSS among the music, amplified in your tweeters. Digital audio doesn't have this issue, so NR isn't needed today. In this video, we make two recordings: one using Dolby NR on a Linear Stereo VHS deck, and another with DBX NR and compare sound.
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