[sdiy] OTish - CDDA bandwidth

[Nicholas Gregorich]

On Dec 14, 2006, at 9:33 PM, Dave Manley wrote:

> Nicholas Gregorich wrote:
>> Now we all know the sampling rate is 44.1kHz.  ...
>> So my basic question is are CDs band limited to 11kHz and  
>> uselessly sampled at twice Nyquist?
> No.
>
> Sample rate is ~44k which is twice the bandlimited audio being  
> sampled.
>
> So the audio is limited to 22k not 11k.
>
> See more at:
> http://en.wikipedia.org/wiki/Nyquist-Shannon_sampling_theorem  
> (google nyquist) or
> http://www.teamcombooks.com/mp3handbook/11.htm (google cd audio  
> bandwidth) or
> http://www.lavryengineering.com/documents/Sampling_Theory.pdf  
> (wikipedia reference)
>
> Google really is your friend.
>
> -Dave
>

I mentioned that I Googled in my original post.

I have learned Nyquist in many classes and I'd like to think I  
understand it well.  The lecture notes provided by my professor  
confused me so I asked here.

http://homepage.mac.com/nicksdsu/cdda.pdf

You can read the slide here.  Perhaps you can better understand my  
confusion.

Nick.