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DBX 700

From Chace Audio

DBX 700 is a legacy digital audio recording system that was introduced in the mid 1980s. A two-channel system that was used for mastering, the DBX 700 hardware encodes a stereo analog signal and records "companded predictive delta modulation" digital audio to an external video tape machine. The same hardware also decodes the digital audio upon playback. The DBX 700 utilizes very high sample and bit rates, resulting in high quality recordings, and can use any composite video, even VHS or Beta, to store the digital information. The "companded predictive delta modulation" process held certain advantages over the more commonly used "pulse code modulation" (PCM) technology of that time.

In the late 1980s and early 1990s, Chace Audio used DBX 700, with a time code synchronized VHS deck, to record the masters of our Chace Surround Stereo™ upmixes. Our anecdotal experience has demonstrated that properly stored DBX 700 VHS tapes have retained their data integrity to this day.