Comments by "Neil Forbes" (@neilforbes416) on "What is High Fidelity? How does Stereo work?" video.

  1. At the 12:30 mark your description of a stereo pickup cartridge is WRONG! The elements in a stereo cartridge to pick up the relevant left and right channels are positioned at 45-degree angles to the stylus as the grooves of the stereo record(LP, EP or single) are at 45-degree angles. The inner wall(facing away from label area) carries one channel while the outer wall(facing away from outer edge) carries the other. This method of laying stereo grooves into a disc was first invented in 1938 by Alan D. Blumlein while he was working at the then-recently-amalgamated Columbia Graphophone Company and The Gramophone Company(rightful owners of the HMV trademark) which came together in 1938 to form EMI(Electric & Musical Industries) Ltd.
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  2. Without Alan Blumlein's pioneering work, we would not have had stereophonic LPs, EPs or singles. Though regrettably Blumlein was ahead of his time in that while he got the technology right, he was nonetheless restricted to the noisy-surfaced coarse-grooved shellac discs of the 78rpm era to reproduce his stereo records. The technology Blumlein invented would not realise its true potential until well into the era of vinyl 33-1/3 and 45rpm records.
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  3. 12:13 - I'd have thought you'd have corrected this graphic by now. The Two elements of a stereo phono pick-up are set at 45 degrees relative to vertical, with one element 45 degrees to the left and the other at 45 degrees to the right. As the stylus rides in the groove, it pushes against these elements to varying degrees in a way that means it moves let-to-right as well as up-and-down(you got that bit right). This is how Alan D. Blumlein devised his stereo pick-up head to play the record, and, and with more powerful elements in the recording head to cut the stereo groove.
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  4.  @iconoclad  Yes, he needs to redo that graphic to correct the mistake.
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  5. So what would you call the "woofers"? Rotweilers or Doberman Pinchers? LOL Grrrrrrrr Ruff!
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