What’s the difference between normal stereo and Dolby stereo?

Question

I’ve always seen Dolby Stereo logos on CDs or cassettes but I don’t know the difference with normal stereo. I only know Dolby surround or Dolby Atmos which is spatial audio like 5.1 and 7.1 .

In: Technology

Answer 1

Dolby stereo was created to eliminate background sounds from the recording. There are some artists whose songs sound different when played in Dolby vs regular stereo. Certain frequencies are blocked out by Dolby, which, in some cases can eliminate a whole instrument from the recording.