I responded:
> > When you record at 32k, you can go back over the footage and audio you
> > recorded and _add_ another stereo track, narration, voice over, etc, in
the
> > camera and in certain decks- without disturbing what's already on tape.
> > When you record 48k audio, you use up all the audio bandwith so
there's
> > no room for the additional audio information.
as far as I can discern through the botched HTML it was
paulvesco@paulvesco.com who then asked:
> .color..param.0000,0000,FFFF./param.The fact that you are in a
> different sampling rate does not keep you from doing any dubs,
> additional tracks or mixing... that's actually the statement that
> caused me to create this reply...
> ./color..color..param.FFFF,0000,0000./param. you don't have any more
> limitation on mixing, dubbing, etc in 32Khz, 44.1Khz or
> 48Khz../color.color.param.0000,0000,FFFF./param... it is just the
> size of the files and possible effect on quality of the recording (some
> recordings just don't need the higher rates, because they don't contain
> any of the extended frequencies or dynamic range which is provided by
> the "higher" rates).
I was specifing something completely different. The DV format allows for
two different audio sampling rates: 32k and 48k. All variants of the DV format
(DV, DVCAM and DVCPRO (the original)) understand that 32k allows for 4 tracks
of audio to follow the video on the tape. 48k only allows 2 tracks of audio to
be recorded on the tape along with the video.
I took the original question to be asking for more information about the
"dubbing" capabilities mentioned in the camcorder's manual as well as the
possible problems that may arise when transfering the audio information into
the computer with the video.
I am not discussing what format is better or worse. I'm saying what
exists and how it works.
Certain DV camcorders and decks allow you to "dub" onto the second set of
32k audio tracks (a stereo pair... tracks 3 & 4 if you will) _after_ tracks 1
& 2 and the video are in place. You cannot "dub" onto tracks 1 and 2 except in
a professional editing deck with an edit controller with insert capability.
(The professional deck and the cheapest camcorder with dub capability vary in
price by more than $10,000.)
However, if the camcorder records the audio in 48k, then "dubbing" is not
possible in the camcorder because there is not track 3 & 4.
Then I noted how you can get track 1 & 2 of either the 32k audio, or the
48k audio, into the computer via firewire without a problem. The only
difficulty arises when you have all four channels of audio filled (at 32k).
This can be either from a "dubbed" tape, or from a tape shot in the Canon
XL-1, whcih can record onto all four channels at the same time (when
shooting).
No non-linear DV system that digitizes via firewire (that I am aware of)
currently has the capability to bring in all four tracks of audio into the
computer with the video. The solution is to digitize video and audio 1&2 in
one pass as you do now, then digitize just audio 3&4 with the batch capture
lists.
Panasonic's NewsByte and Sony's Edit Station may be able to take in all
the audio data in one pass (which can occur at 4x realtime in both systems,
but which does not use Firewire in either- to the best of my knowledge), but
these are closed, propritary editing systems.
In an edit situation, as always, you are capable of adding and mixing
audio as you see fit. This is between decks or in the timeline within a NL
system. I was not arguing this. I was merely answering the original question.
> .color..param.0000,0000,FFFF./param. And now, finally,
> ./color..color..param.FFFF,0000,0000./param. you can record at ANY
> rate and can transfer that recording to another machine
> ./color..color..param.0000,0000,FFFF./param.... via your analog
> I/O.... not state-of-the-art, but has saved many a day for me (my audio
> machines only handle 44.1).
I believe I agree with you... that you can input 32k, 44.1k and 48k and
then output what you need. The higher the better.
Anthony
________
Anthony Burokas, Media Technician, IEBA Productions, Inc., Phila. PA
+ Digital Video Consulting and Integration + DV/ DVCAM Sales +
V: (215) 632-3283 + Fax: (215) 612-0663
Go to: <A HREF="http://ieba.com">IEBA.com</A> to find out more.
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