Was playing around with sox spectrogram, and got this for one of the tracks. Very curious 60Hz line throughout track 9. Not sure if it's a sox artifact, or something in the recording.
Black Snake Moan - 09 - John Doe - The Losing Kind
$ sox 09*mp3 -n rate 200 channels 1 spectrogram -x 1200 -y 600 -Z 5 -o sox.png
Black Snake Moan - 09 - John Doe - The Losing Kind
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