[TriEmbed] This hertz to read - why is 32768 Hz the perfect frequency?

[John Vaughters]

Ok, with all the responses, I had to read it. It was painful, but like most, I got the gist. And I will say that I have always noticed 32768 Hz referenced in electronics documents. I never thought much of it as I saw 32768 referenced in any binary based system. I found it interesting that it has "Magical" properties. Tesla would be proud of all of us for noticing `,~)

Thanks to those that posted it and those that elaborated on it as well.

It's good to know that Crystal Hippies were actually right about magical crystals and it is supported by science.

John Vaughters






On Friday, March 31, 2023 at 11:03:07 AM EDT, Peter Soper via TriEmbed <triembed at triembed.org> wrote: 






It's what sales wrote. Reminds me of a harsh joke I picked up in the 70s (that has MANY exceptions): How do you tell the difference between a computer salesman and a car salesman? A car salesman knows when he/she is lying. (Hmm. ChatGPT will slot right in for the current century. But maybe "perceives" would be better.) 
Pete 





Mar 31, 2023 10:53:23 AM Rodney Radford via TriEmbed <triembed at triembed.org>:


>  
>  That is one of many issues with that page - I posted it here more as a laugh to those that know more than this page - not as a real page of information. 
>  
> 
> 
>  Which is why I said it "hertz my brain" and why I posted tongue in cheek that there were "a lot of new facts from this I have never seen in any other location before"  ;-) 
> 
>  
> 
> 
>  Considering this is a vendor's page, i certainly would not want to order anything from this vendor if this is their level of understanding of what they are producing/selling. 
> 
> 
> 
>  
>  On Fri, Mar 31, 2023 at 9:32 AM Brian via TriEmbed <triembed at triembed.org> wrote: 
> 
> 
>>  On 3/31/23 00:35, Tadd Torborg via TriEmbed wrote: 
>>>  From the linked article 
>>> 
>>> *"The majority of digital audio equipment operates at a sample rate of 
>>> 44.1 kHz or precisely 215 Hz”* 
>>> 
>> 
>> This is a patently false statement even if you add in the missing caret. 
>> 
>> Yeah, so as others have pointed out, the real answer to the silly 
>> headline question is because it makes a 16-bit counter overflow at 
>> exactly 1 Hz, which is super useful for driving digital timepieces, and 
>> apparently happens to be a comfortable resonating frequency for a quartz 
>> crystal. 
>> 
>> There's no clever relationship between 2^16 and 44.1 kHz, though.  44.1k 
>> is not a nice power of two.  It comes, possibly, from NTSC TV scan 
>> rates; see https://dsp.stackexchange.com/a/17702 
>> 
>> I would question the use of the word "majority" in that sentence as 
>> well.  I'd claim the vast majority of digital audio equipment is capable 
>> of handling a variety of sampling rates. 
>> 
>> -B (who dabbles in the guts of digital audio) 
>> 
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