Has noise reduction, A-type, always been applied to all SVA optical sound tracks even if the tracks are of a formerly released mono print, variable area or variable density, with both SVA tracks now being identical? It has never been clear with Dolby processors if the MONO Format-01 and the academy filter "in" and noise reduction "out" was intended to be only used with the earlier mono variable density (VD) and mono variable area (VA) sound tracks. I believe Format-02 was also for mono optical sound tracks, but with the academy filter "out" and noise reduction "in". Again, it is not clear if this format was intended for SVA tracks, or, only those recorded as single VA or VD? Were noise reduction processes applied to some VA and VD film sound tracks before stereo variable area came along? Maybe the Dolby old timers here can sort these uncertainties out before the correct intentions and applications are lost.
Thank you, Paul Finn
Thank you, Paul Finn
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