Stereo Vinyls Wiki
The official website of stereo vinyls collection.
Stereo vinyls wiki. With digital recording masters could be created and duplicated. However in the 1950s the bbc determined in a series of tests that only 20 25 db is required for the impression of full stereo separation. Although noise reduction techniques exist they also increase other audio distortions such as azimuth shift wow and flutter print through and stereo image shift. Later that same year bell labs also demonstrated binaural sound at the chicago world s fair in 1933 using a dummy with microphones instead of ears.
The two signals were sent out over separate am station bands. A common modern view is that stereo isolation must be higher than this to achieve a proper stereo soundstage.