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  #11  
Old 01-14-2006, 10:21 AM
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Default Re: The C.A.S. and Digidesign Present

[QUOTE]
Quote:
Quote:

Now who can tell me why CD-quality audio is sampled at 44.1kHz (hint - its related)?

it doesn't have to do with NYQUIST and/or a certain SONY excecutive who wanted all of Beethoven's 9th on one disc?
No, although that makes for a great myth. NTSC video has 490 lines of visible picture per frame. There are 30 frames per second (humor me). 490*30=14,700 lines/second. CD quality audio is sampled at 44,100Hz. 44,100/14.700=3. The devices used to encode digital audio to U-Matic recorders encode three (3) 16 bit samples per line.
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  #12  
Old 01-14-2006, 11:00 AM
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Default Re: The C.A.S. and Digidesign Present

[QUOTE]
Quote:
No, although that makes for a great myth. NTSC video has 490 lines of visible picture per frame. There are 30 frames per second (humor me). 490*30=14,700 lines/second. CD quality audio is sampled at 44,100Hz. 44,100/14.700=3. The devices used to encode digital audio to U-Matic recorders encode three (3) 16 bit samples per line.
ok, we are officially side tracking this thread.

i had read that NTSC video had maximum vertical resolution of 480 lines. it is 490?

so it it isn't 480*29.97=14385.6? 44100/14385.6=3.065...
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  #13  
Old 01-14-2006, 11:17 AM
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Default Re: The C.A.S. and Digidesign Present

OK BOYS,
Time to get back on track. If you would like to talk about the basis of NTSC how about starting another thread?
Back to the topic " The CAS and Digidesign Present" .............
And how did you like the seminar?
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  #14  
Old 01-14-2006, 09:54 PM
Don Barto Don Barto is offline
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Default Re: The C.A.S. and Digidesign Present

Thanks for jogging my memory, everyone. And sorry to have started such an erruption.
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  #15  
Old 01-15-2006, 02:27 PM
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Default Re: The C.A.S. and Digidesign Present

Quote:

And how did you like the seminar?
The highlights of the seminar, for me, were...

Reel 1, 52:02 - Scott Wood says, "It can be stamped one way, it can be recorded one way but stamped another. ...We have been doing a fair amount of work at Digi gathering location recorder files from different companies and recording the way that they do work."

Which is the perfect segue to...

Reel 2, 48:13 - Glen(sp?) from Zaxcom says, "The biggest favor you can do this industry is to make sure that the sample rate stamped on the file represents the file's recorded frequency, not the frequency someone is going to play it at. That causes almost all the problems in post production. Make that a mandate."

So, how about it, Digidesign? Will Pro Tools HD v7.2 bear the fruit of the labor Scott Wood refers to? Will you implement Glen's plea?

Reel 2, 42:04 - Glen makes the statement, confirmed by someone in the crowd, that AVID/Digidesign only supports 8 channel polyphonic BWF files. If the standard calls for more than 8 channels, how about fully implementing the standard? If its Zaxcom that is out of line, relative to the standard, by recording 10 channels, then remind them of that. Glen then says, "I would like to work with you guys and implement that as seamlessly as possible." Scott then immediately says, "This is the future." Well, I'm not affected by this, but others obviously are, so hopefully the future of Pro Tools (HD v7.2?) addresses these points for those that are affected by them.

I heard the word workaround one too many times, in my opinion. How about some solutions instead of workarounds?

Since I do not work on films, this might be less of a concern than it seems to me, but with the number 23.976 used so much in the seminar, it begs this question. Will NAB 2006 be the event where Digidesign releases a SYNC I/O that can resolve to tri-level sync? If you look at the PowerPoint slides that AVID had, three of the four workflows have a Sound Edit/Mix step where 23.976 is the rate. Maybe it is in AVID's best interest to help speedup (no pun intended) the development of a SYNC I/O that will resolve to tri-level sync? After all, its in their chart that in some cases we should be resolved to that. Maybe they don't know that we can't do that now? That would be scary.
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  #16  
Old 01-21-2006, 08:48 AM
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Default Re: The C.A.S. and Digidesign Present

UPDATE
I wanted to let you know that the First seminar Video is available:
"The Work Flow From Production Through Post Production"

http://www.cinemaaudiosociety.org/se.../workflow1.php
Now both seminars are available to you for free.
Enjoy!
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  #17  
Old 01-28-2006, 11:18 AM
Tiago Silva Tiago Silva is offline
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Default Re: The C.A.S. and Digidesign Present

Great job, Marti! Thanks.

After listening to the audio version of the second seminar, I realized that this time, I had to get the video (and the presentation). I've been trying to download the video through your Digidelivery but I'm getting nowhere.

Do you know if the Digidelivery client works properly behind a Microsoft proxy server with NTLM authentication? Ever since our admin installed that *thing* that lots of things stopped working (pop3 mail, for example). Basically, if the client needs any TCP port other than 80 or 8080 I'm stuffed. It can just be that the server is hammered (or off, it's a Saturday ).
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  #18  
Old 02-01-2006, 05:48 AM
ripple FX ripple FX is offline
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Default Re: The C.A.S. and Digidesign Present

Hi Marti. When I use this link:

dgd://28AE38AA3AFA4CE6257C923EADC730...-g2i37xg4cjqta

DigiDelivery reports "Delivery has expired"

What's a mother to do?

Cheers,
Chris
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  #19  
Old 02-01-2006, 09:13 AM
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Default Re: The C.A.S. and Digidesign Present

I have contacted "Digi". A new link will be coming within the next 24 hours. I'll post it when it comes.
Take Care,
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  #20  
Old 02-02-2006, 05:51 PM
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Default Re: The C.A.S. and Digidesign Present

IT'S BACK!!! AS PROMISED!
Go to the link above that takes you to the Cinema Audio Society site for dowmload.
It is also available as a "Google Flash" for those of you who want to watch it right away!
The first seminar is also available as a "Google Flash".
Thanks again Scott Wood and Digi !
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