How is stereo sound produced?

1) To fix the sound field, two or more microphones are used, spaced at a certain distance from each other. The pulsating audio frequency current generated by each of the microphones is amplified by separate amplifiers independent of each other and recorded on separate channels of the carrier. During playback, the sound received from each of the microphones is amplified independently and fed to separate speakers or loudspeakers located according to the placement of the microphones. Thus, the sound picture that existed at the time of recording is recreated.
2) A stereo phonogram is created by distributing several original monophonic recordings to different channels using a “panoramic mixer”. When creating pseudo-stereo phonograms, different sound sources are recorded separately or separate microphones are installed for them. Then, in the process of mixing, the received signals are distributed over the channels of the finished phonogram.