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Hi folks: I'm working on cleaning up a Perfect record from 1932, and I have no reference on the de-emphasis curves. First try by ear suggests a turnover frequency of 500 Hz and a 10kHz rolloff of 12dB. Does that sound like a good starting point? Peace, Paul Stamler --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus