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In Reply to: Highest frequency presnt on LPs? posted by thekong on September 22, 2009 at 22:20:49:
The old CD-4 quadraphonic records from the 1970s used a 30KHz carrier frequency to carry the R and L difference signals. The Shibata fine line stylus profile was invented to read that carrier frequency. You can read some details of how CD-4 worked on Wikipedia at the link below.
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Follow Ups
- LPs can go to at least 30kHz - Rob Doorack 05:50:13 09/23/09 (5)
- Also, 29KHz tape bias can be found on some LP's... - Bry 07:24:06 09/23/09 (4)
- RE: Also, 29KHz tape bias can be found on some LP's... - Werner 07:42:32 09/23/09 (3)
- RE: Also, 29KHz tape bias can be found on some LP's... - John Elison 09:07:23 09/23/09 (2)
- RE: Also, 29KHz tape bias can be found on some LP's... - Werner 23:17:11 09/23/09 (1)
- Stan Ricker once claimed he could cut a 60khz bias - Axon 12:07:09 09/24/09 (0)