Low frequencies on CDs

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Listening to some CDs I was curious to find out if some the "low" sounds I heard were actually that low and I got hold of a program called Spectrum Analyser Pro.

Ran a couple of CDs through this and found some songs with very low frequency sounds on them, okay not really sub-sonic, but still low enough to cause some serious vibrations :) and yes, Byrd, that Bose designed pot plant works rather well with these frequencies, in fact I am sure it will take off one of these days :icon_naughty:

Here are some songs with the lowest frequencies I measured(I have not checked out any Pipe Organ CDs yet)

Shakira(Oral Fixation 2) - How do you do - 63.1Hz(Not that low, actually a "common" low freq)

Tamara Dey(First Lady & the Boys) Most of the songs - 50 to 63Hz

Katie Melua(Piece by Piece) - Nine Million Bicycles - 50Hz

Jack Johnson(In between Dreams) - Sitting, Waiting, Wishing - 40Hz

Tananas(Wide Ensemble) - Nongolo - 40Hz

And then the lowest I have found thus far:

Avril Lavigne(Let Go) - Sk8ter - 31Hz

Thought I have to start something here again :icon_naughty:
 
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