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Most machines had a Macrovision detector that would block the record button signal from activating the record circuit, VCRs without that circuit (such as pre-lawsuit ruling Beta decks which were built that way on purpose) would record a macrovision laced signal Macrovision and all to tape without a care....In fact if one can identify the macrovision detector stage in any VCR or video recording device and disable it then it should be possible to copy a macrovision protected signal (albeit perhaps with AGC confusion effects) without stripping the mac...
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