In Reply to: So bushell it is :) (nt) posted by 13th Duke of Wymbourne on April 20, 2016 at 21:20:19:
Seriously.
I was speaking with a major big-shot household name digital guy, and I--honestly, not being provocative or setting a trap--I asked, does anyone know offhand, converting time to distance, how LONG a SINGLE positive PCM pulse would be, if it were frozen in time?
In other words, given the interchangeability of frequency and time, and time and distance, if one froze a single positive PCM pulse in time, how long would a S/PDIF cable have to be, in order to hold a single frozen positive PCM pulse?
He laughed genially and said that he had never ever heard anyone even think about that, it could not possibly matter.
I replied, I am hearing differences at 44.1 kHz with a 3.5 inch difference in cable length...
So I sat down and did the math, and did the math, and did the math, and called him again and said I must be having a stroke, this can't be right.
That was almost 24 hours.
I walked him through my calculations, and he laughed and said, well, you have to be right!
ANYONE, please re-do it!
BTW, at that transfer function speed, the difference between 44.1 and 48 is no big deal.
OK, I calculate a singe positive PCM pulse (Zero to .25V and back to Zero), frozen in time, measured in length, as: THREE MILES.
So, what I heard in prototypes that were 3.5 inches different, can't possibly make a difference. But... people hear it.
I was trained as a translator of French poetry and I got a law degree and was co-author of peer-reviewed papers read at Harvard Law School, and, honestly:
I can't say whether the cables I sell sound good because of my work or DESPITE my work.
They are what they are. If they make people happy, I am happy.
John
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Follow Ups
- I'd bet on Charley Hanson's being right!!!! - John Marks 21:36:38 04/20/16 (21)
- RE: I'd bet on Charley Hanson's being right!!!! - Tony Lauck 13:29:50 04/21/16 (20)
- Here's my calculation, which is based on the word-clock rate (but I assumed 16 bits) - John Marks 18:06:12 04/21/16 (19)
- RE: Here's my calculation, which is based on the word-clock rate (but I assumed 16 bits) - fmak 22:00:22 04/22/16 (1)
- It's not the basis of the design--it was an INQUIRY (perhaps the wrong tree was barked up, so what) into why.. - John Marks 07:08:58 04/23/16 (0)
- RE: Here's my calculation, which is based on the word-clock rate (but I assumed 16 bits) - Dave_K 13:09:34 04/22/16 (2)
- I agree, it is the transitions that matter! - John Marks 13:22:28 04/22/16 (1)
- RE: I agree, it is the transitions that matter! - Dave_K 15:09:20 04/25/16 (0)
- RE: Here's my calculation, which is based on the word-clock rate (but I assumed 16 bits) - Tony Lauck 12:11:26 04/22/16 (13)
- Thanks, but could you please elaborate on... - John Marks 13:25:57 04/22/16 (12)
- RE: Thanks, but could you please elaborate on... - Tony Lauck 09:13:38 04/23/16 (8)
- I think then we are using different terms for the same thing - John Marks 10:12:01 04/23/16 (3)
- RE: I think then we are using different terms for the same thing - Tony Lauck 10:35:22 04/23/16 (2)
- If as much money flowed into high end audio as flowed into military electronics - Dave_K 14:45:52 04/25/16 (0)
- Well, is not dCS a Military Avionics Prime Contractor??? NT - John Marks 10:57:56 04/23/16 (0)
- RE: Thanks, but could you please elaborate on... - Isaak J. Garvey 09:35:37 04/23/16 (3)
- RE: Thanks, but could you please elaborate on... - Dave_K 14:33:50 04/25/16 (0)
- RE: Thanks, but could you please elaborate on... - Tony Lauck 14:52:57 04/23/16 (1)
- RE: Thanks, but could you please elaborate on... - Isaak J. Garvey 15:07:22 04/23/16 (0)
- RE: Thanks, but could you please elaborate on... - Isaak J. Garvey 17:47:15 04/22/16 (2)
- I appreciate your support, but, I take Tony seriously! I am always willing to learn. - John Marks 19:14:31 04/22/16 (1)
- RE: I appreciate your support, but, I take Tony seriously! I am always willing to learn. - Isaak J. Garvey 20:35:33 04/22/16 (0)