How many stripes? at DVinfo.net
DV Info Net

Go Back   DV Info Net > The Tools of DV and HD Production > All Things Audio

All Things Audio
Everything Audio, from acquisition to postproduction.

Reply
 
Thread Tools Search this Thread
Old June 21st, 2005, 07:02 PM   #1
Fred Retread
 
Join Date: Jul 2004
Location: Hartford, CT
Posts: 1,227
How many stripes?

It's surprising sometimes to discover what we don't know--holes in our knowledge that we've never had to fill in (might be an interesting thread starter). Anyway, along those lines I've had occasion to wonder this:

Are video and audio recorded in the same magnetic track on the tape? Seems they should be, since captured .avi is identical to what's on the tape, but I can conceive otherwise.

Is this still true in 12-bit mode? If so, are channels 3 and 4 ("stereo 2") added to that one magnetic track when you dub in 12 bit mode, or is a second magnetic track laid down? I can picture either process.
__________________
"Nothing in the world can take the place of persistence..." - Calvin Coolidge
"My brain is wired to want to know how other things are wired." - Me
David Ennis is offline   Reply With Quote
Old June 21st, 2005, 11:15 PM   #2
Inner Circle
 
Join Date: Jun 2003
Location: Toronto, Canada
Posts: 4,750
Hey Fred,
You can read about how many of the digital formats are recorded at the following site:
http://www.danalee.ca/ttt/video_recording.htm

DVCPRO has a audio cue track?, which may be different than mini-DV.

Quote:
Is this still true in 12-bit mode? If so, are channels 3 and 4 ("stereo 2") added to that one magnetic track when you dub in 12 bit mode, or is a second magnetic track laid down? I can picture either process.
"12bit": 12-bit bit depth, 32khz sampling rate, 4 tracks of audio. I believe insert editing is of the third and fourth track is possible (i.e. you want to dub in narration), which suggests this sound is recorded seperately. But I could be wrong!
In practical use, I'd avoid 12bit audio. Sync issues, quality issues, capture issues. Plus many cameras can't record all 4 tracks at once.
16bit: 16bit bit depth, 48khz sampling rate, 2 tracks of audio.
Glenn Chan is offline   Reply With Quote
Old June 22nd, 2005, 04:22 PM   #3
Fred Retread
 
Join Date: Jul 2004
Location: Hartford, CT
Posts: 1,227
Thanks Glen. Checked out that excellent link. Whew! It's a deep subject!

And thanks for the advice, but don't worry, I have no intention of using 12-bit, it was just musing on my part.
__________________
"Nothing in the world can take the place of persistence..." - Calvin Coolidge
"My brain is wired to want to know how other things are wired." - Me
David Ennis is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

B&H Photo Video
(866) 521-7381
New York, NY USA

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK


DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > All Things Audio

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



All times are GMT -6. The time now is 09:44 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network