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Vertical CD player

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This Post Has Been Edited by the Author

In Reply to: RE: Absolute level of CD during play posted by jea48 on September 12, 2023 at 20:35:04

Whether the disc is spinning horizontally or vertically, the dynamic stability of the disc should be obtained and verified. There can sometimes be mechanisms in a CD player for maintaining dynamic stability of the disc but I would not be surprised if many players don't control dynamic stability, since the designers may be unaware such a problem exists, allowing the disc to flutter and/or wobble during play.

Wobbling and fluttering are what produces laser read errors due to nano scale dimensions of the data spiral and laser beam width. Obviously for some players such as Sony SACD player, designed so the disc can't move during play, obtaining absolute level is not necessary. It would be an interesting experiment to see how important absolute verticality is for vertical players.

Pop quiz - for vertical player, how would you ensure the disc is absolutely vertical while spinning?

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