>> Well CDs use the obscure rate of 44.1 kHz. Not 44 kHz, but 44.1 kHz. 
>> Apparently this is due to some historical reasoning that I forget now.
> 
> http://en.wikipedia.org/wiki/Red_Book_(audio_CD_standard)#Technical_details
> http://en.wikipedia.org/wiki/PCM_adaptor#How_a_PCM_adaptor_works

...so it's derived from old PAL video timings? :-D

(Kinda like the way many old 8-bit home computers have different CPU 
speed depending on whether it's PAL or NTSC...)

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