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Posted by Frank on 06/02/06 23:07
On Fri, 02 Jun 2006 15:55:18 -0400, in 'rec.video.production',
in article <Re: Mini DV Audio need your help or suggestions>,
Rick Merrill <rick0.merrill@NOSPAMgmail.com> wrote:
>Gene E. Bloch wrote:
>
>> On 6/02/2006, Rick Merrill posted this:
>>
>>> Gene E. Bloch wrote:
>>>
>>>> On 6/02/2006, raida4life@yahoo.com posted this:
>>>>
>>>>> David Matthew Wood wrote:
>>>>>
>>>>>>> I recently had some people helping me out with some video recordings.
>>>>>>> Some tapes I got in 8mm and have always been able to transfer
>>>>>>> these to
>>>>>>> VHS or DVD via RCA cables. Similarly I got some that were Digital
>>>>>>> 8 and
>>>>>>> I was able to do likewise.
>>>>>>>
>>>>>>> Recently I got some Mini DV (not Mini DVD) tapes and discovered after
>>>>>>> the fact that all of these recordings were done in such a format that
>>>>>>> the Audio is not reproducible by any other means than from the guy
>>>>>>> who
>>>>>>> taped these for me. The video always comes through fine, it's just
>>>>>>> the
>>>>>>> audio I am having trouble with. I tried a couple of iterations of
>>>>>>> swapping out the audio cables and made sure they were properly
>>>>>>> connected.
>>>>>>>
>>>>>>> He left a few untransfered to DVD for me and now I am stuck with Mini
>>>>>>> DV tapes that I can not get the sound out of. I suspect these were
>>>>>>> recorded in 16 bit Audio, because all of the 12 Bit recordings play
>>>>>>> back just fine. I have tried in vain using other camcorders and even
>>>>>>> messed with every combination of audio setting on the camcorder with
>>>>>>> the RCA jacks, but the Audio just does not come through. I have only
>>>>>>> tried using RCA jacks, I am not familiar with other technologies.
>>>>>>>
>>>>>>> If someone can help me figure out how to recover the audio from these
>>>>>>> recordings along with the video stream, I would be very thankful.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Double check the audio settings on whatever it is you're playing back
>>>>>> on. Since the audio on his tapes is in 16-bit 48khz mode, there will
>>>>>> only be audio on channels 1 and 2 while 12-bit 32khz mode (even though
>>>>>> there is a loss in sound quality this way) can have 4 channels of
>>>>>> audio.
>>>>>
>>>>>
>>>>>
>>>>> I bought 4 different players and had to return each as every time I
>>>>> changed the settings either I got no sound or intermittent sound
>>>>> playback. Each time I tried this I played them back and made sure the
>>>>> cables weren't loose. I just wonder if this is all due to the fact that
>>>>> I am using RCA jacks to try and retreive the audio and video from these
>>>>> tapes. I am concerned that I may get other recordings like this from
>>>>> Mini DV tapes in the future, and that the tapes may not be able to be
>>>>> played back because this is a problem with Mini DV technology.
>>>>
>>>>
>>>>
>>>> I've recorded audio in 12-bit (accidentally) and 16-bit
>>>> (intentionally) and never had "a problem with Mini DV technology".
>>>> You've got some settings wrong somewhere, but from your description I
>>>> can't guess what.
>>>>
>>>>> I have camcorder equipment that can playback 8mm, Digital 8 tapes and
>>>>> even VHS C, but I have only experienced this problem with Mini DV. I
>>>>> will try the firewire option as someone suggested. I guess it is time I
>>>>> got with the times. One thing I noticed is that several camera manuals
>>>>> indicate that you can only playback 16 bit audio recordings in 12 bit
>>>>> audio mode.In many cases when I tried to change the settings on most of
>>>>> these cameras they would not let me change the Audio to 16 bit.
>>>>
>>>>
>>>>
>>>> Your last two sentences don't make sense to me.
>>>>
>>>> 1. You can't play 16-bit recordings in 12-bit mode. However, AFIK,
>>>> the camera will automatically play tapes in the mode they are
>>>> recorded in, so you shouldn't have to make any settings.
>>>>
>>>> 2. In the record mode, you can only change the settings for future
>>>> recordings; as I read your last sentence I wonder if you meant that
>>>> while you were in playback mode, you were trying to change the record
>>>> mode of an existing tape...
>>>>
>>>> You might mention what camcorder or player you're using so someone
>>>> who knows the equipment or has the manual can guide you more accurately.
>>>>
>>>
>>> I wonder if he recorded in "VR " mode instead of "Video" mode?
>>
>>
>> He's talking about a camcorder...
>>
>
>So am I talking about a camcorder. Specifically Sony DVD camcorders have
>two Very Different record modes (VR vs Video). Look it up.
Rick, the OP wrote "Mini DV (not Mini DVD) tapes". The OP is *not*
referring to a DVD camcorder, hence the VR versus Video record mode
issue doesn't apply to this situation.
The problem/question here appears to relate to 12/32 DV audio versus
16/48 DV audio, although the OP hasn't indicated what sort of
equipment he's using to play back the tape, so it's difficult to offer
suggestions other than to try a FireWire connection instead of an
analog audio connection.
--
Frank, Independent Consultant, New York, NY
[Please remove 'nojunkmail.' from address to reply via e-mail.]
Read Frank's thoughts on HDV at http://www.humanvalues.net/hdv/
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