Thread: What does fs mean?

Posts: 23
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Post by jshowalter March 28, 2012 (1 of 23)
This seems like a bonehead question, but wikipedia doesn't define it, googling is pointless, and searching for it on sa-cd.net brings up a lot of posts containing 64fs, but the meaning of "fs" is never defined. Please help!

Post by zeus March 29, 2012 (2 of 23)
jshowalter said:

This seems like a bonehead question, but wikipedia doesn't define it, googling is pointless, and searching for it on sa-cd.net brings up a lot of posts containing 64fs, but the meaning of "fs" is never defined. Please help!

I believe "frequency sampling", namely 64 x that of CD (44.1kHz).

Post by Nagraboy March 29, 2012 (3 of 23)
I think sometimes it can mean 'full scale', as in 64fs means 64 times the full scale CD rate of 44.1kS/s which gives the DSD rate of 2822.4kS/s.

Post by Yoropiko1 March 29, 2012 (4 of 23)
I'd never heard of fs only sf ( sampling frequency ), I guess somebody just switched it round LOL

Post by krisjan March 29, 2012 (5 of 23)
In physics, it stands for femto-seconds (10 to the power of -15).

Post by audioholik March 29, 2012 (6 of 23)
Yoropiko1 said:

I'd never heard of fs only sf

which stands for "science fiction" :)

Post by Kal Rubinson March 29, 2012 (7 of 23)
jshowalter said:

This seems like a bonehead question, but wikipedia doesn't define it, googling is pointless, and searching for it on sa-cd.net brings up a lot of posts containing 64fs, but the meaning of "fs" is never defined. Please help!

In the context of digital audio, it means sampling frequency but is clumsily written. It should be either f(s) or f with the s as a subscript. It does not mean "full-scale" but, of course, it can mean that or other things in other contexts. There are related terms like fclk (clock frequency).

Post by tailspn March 29, 2012 (8 of 23)
As Kal and zuse stated, it's a clumsy notation in audiospeak to express a multiplier from a basic reference sampling frequency. In DSD terms, since its sampling frequency is a multiple of 44.1KHz, 64fs is a notation that the sampling frequrncy is 64 X 41.1KHz, or 2.82MHz.

Post by The Seventh Taylor March 29, 2012 (9 of 23)
Kal Rubinson said:

In the context of digital audio, it means sampling frequency but is clumsily written. It should be either f(s) or f with the s as a subscript.

Exactly. As done here in the /faq

Post by jshowalter March 31, 2012 (10 of 23)
Thank you for the replies. No idea why the site where I saw that transposed f and s from sampling frequency.

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