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Hi folks: I finally got a version of the anomalous record posted. If everything is working right, it should be at http://tinyurl.com/y72chknu . What I did was, I took the file I had and converted it to a 16-bit mono file, then encoded that with FLAC. It's still 9 megs. You should be able to easily hear the hum, and if you have a spectrum analyzer, you should be able to see it at 57.5Hz with an add'l component at 40Hz. You should also be able to hear the music; it doesn't sound like an acoustical recording to me, because I don't hear the usual horn resonances. For that reason I favor the idea that it's an undocumented experimental electrical recording, rather than a mechanical artifact or something picked up in dubbing from a previous generation. Let me know if you have trouble accessing the file. And let me know what you think is going on here. Peace, Paul --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus