>> OK, well that's pretty weird. I wonder why they suddenly changed it to 
>> 48 kHz then...?
> 
> Well don't forget, that there was nothing widespread before DVD that 
> recorded films in a digital format.  For some reason 48 kHz was pretty 
> standard in the music recording industry, even after CD came along with 
> it's lower sampler rate.  I guess in the film industry they stuck with 
> 48 kHz (as films were obviously never put onto CDs), but then when DVD 
> came along it made sense to have a 48 kHz soundtrack if everything was 
> recorded at 48 kHz anyway.

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. I 
guess DVD uses 48 kHz for a similar reason...

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