I like how RCA tries to make it their innovation, when in fact it was Westrex who developed the stereo cutting head and Audio Fidelity released the first stereo LP in 1958 (before there was a stereo compliant cartridge available to play it).
Peter Nawalan Actually stereo was used in movie soundtracks, 2 tracks, one for your low to mid range frequency and the other mid to high frequency. Then it on the projected it was actually read by an optical pickup!
In typical marketing fashion, the speaker (from the marketing department) treats stereo LPs as an "exclusive" product of RCA, implying that they invented it and are sole marketers. Actually, Westrex invented the stereo (and mono) disk-cutting system and made it available to all record companies. Also, remember that Columbia, RCA's biggest competitor, had invented the 12" 33 rpm long-play record, which RCA resisted by attempting to market 45 rpm as the standard. It is amusing to see RCA showing off the same 12" records that Columbia had invented!
Tangobaldy In 1958 Silvania produced the portable 3 channel speaker phonograph called the "Golden Shield". If something moved from one side to the other it was very apparent tho few artist of the day used this sort of effect.
<a href="#" class="seekto" data-time="164">2:44</a> ceramic bar. tsk tsk tsk tsk. Magnetic cartridges were not developed yet. Well, the records were pressed with a harder vinyl to compensate for this.
