Re: [LAU] Sample rate vs. SNR

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To: Fons Adriaensen <fons@...>
Cc: <linux-audio-user@...>
Date: Friday, January 25, 2013 - 2:45 pm

On Thu, January 24, 2013 5:43 pm, Fons Adriaensen wrote:

> When I was working at BRTN (which was the in analog video era - I've even

Our on air was 2" machines. 5 of them. A very busy place during commercial
breaks.

For out of station feeds we had a (at the time very expensive) frame store
unit for sync.

>

And the frame which is actually two vertical scans... at least over here
in NTSC land. (NTSC = Never Twice the Same Colour)

> the sample frequencies match. MADI and ADAT inputs can be designed so they

Yes for audio (MADI, ADAT, AES3 or whatever else) phase is not the problem
it once was for video. I would imagine the video world has added frame
store to all the inputs of the switchers by now.

> For PRO audio the solution is indeed to use a central clock [*]. This can

This is the difference from video. Video can actually be somewhat out
frequency wise as the frame store can "cheat" during the V retrace to keep
things aligned. Audio can't do that, it has to be the same frequency (if
not phase) or there are artifacts.

--
Len Ovens
www.OvenWerks.net

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Messages in current thread:
[LAU] Sample rate vs. SNR, Len Ovens, (Wed Jan 23, 2:52 pm)
Re: [LAU] Sample rate vs. SNR, Ralf Mardorf, (Wed Jan 23, 4:43 pm)
Re: [LAU] Sample rate vs. SNR, Joe Hartley, (Wed Jan 23, 8:20 pm)
Re: [LAU] Sample rate vs. SNR, Len Ovens, (Wed Jan 23, 10:10 pm)
Re: [LAU] Sample rate vs. SNR, Florian Faber, (Thu Jan 24, 7:53 am)
Re: [LAU] Sample rate vs. SNR, Len Ovens, (Thu Jan 24, 9:52 pm)
Re: [LAU] Sample rate vs. SNR, Fons Adriaensen, (Fri Jan 25, 1:43 am)
Re: [LAU] Sample rate vs. SNR, Len Ovens, (Fri Jan 25, 2:45 pm)
Re: [LAU] Sample rate vs. SNR, Fons Adriaensen, (Fri Jan 25, 3:21 pm)
Re: [LAU] Sync and digital audio transport, Len Ovens, (Fri Feb 1, 2:38 pm)
Re: [LAU] Sample rate vs. SNR, Ralf Mardorf, (Fri Jan 25, 7:15 pm)
Re: [LAU] Sample rate vs. SNR, Len Ovens, (Sat Jan 26, 2:04 am)
Re: [LAU] Sample rate vs. SNR, Ralf Mardorf, (Sat Jan 26, 9:42 am)
Re: [LAU] Sample rate vs. SNR, Len Ovens, (Sat Jan 26, 3:18 pm)
Re: [LAU] Sample rate vs. SNR, Ralf Mardorf, (Sat Jan 26, 3:26 pm)
Re: [LAU] Sample rate vs. SNR, Len Ovens, (Sat Jan 26, 5:21 pm)
Re: [LAU] Sample rate vs. SNR, Ralf Mardorf, (Fri Jan 25, 2:53 pm)
Re: [LAU] Sample rate vs. SNR, Paul Davis, (Wed Jan 23, 11:13 pm)
Re: [LAU] Sample rate vs. SNR, Charles Z Henry, (Thu Jan 24, 1:14 am)
Re: [LAU] Sample rate vs. SNR, Paul Davis, (Thu Jan 24, 2:31 am)
Re: [LAU] Sample rate vs. SNR, Len Ovens, (Thu Jan 24, 3:48 am)
Re: [LAU] Sample rate vs. SNR, Ralf Mardorf, (Thu Jan 24, 1:32 am)
Re: [LAU] Sample rate vs. SNR, Charles Z Henry, (Wed Jan 23, 10:50 pm)
Re: [LAU] Sample rate vs. SNR, Fons Adriaensen, (Wed Jan 23, 4:17 pm)
Re: [LAU] Sample rate vs. SNR, Len Ovens, (Thu Jan 24, 4:26 am)