"Marko Pinteric" <ma***@pinteric.com> wrote in message
news:EHE3g.2088$oj5.780061@news.siol.net...
> Hello experts!
>
> I have JVC GR-DVL 140 digital camera with firewire exit and Ulead
> VideoStudio 7 software.  Connecting camera to my personal computer
> (notebook) was no big effort and when I was capturing two years ago I
> didn't have any serious problems.  However, when I started another
> capturing few days ago the quality of sound deteriorated significantly.
>
> Visual part of video is fine, there is no error in it, however metalic
> noise pulses appear in the sound.  It seems that noise pulses appears only
> when recorded sound is loud enough and possibly of appropriate frequency -
> so this could be some sound loop problem.  In very noise parts of
> recording noise pulses can appear even several times a second.
>
> I was trying to correlate the noise effect with various parameters, like
> the number of electrical appliances working in the neighborhood, number of
> cables etc.  The only working correlation seems to be the following: if
> computer and camera are turned off for some time, there is significant
> reduction of noise after they are turned on again.  After longer use noise
> increases again.
>
> 1. Do you have any suggestions how to solve this problem?
>
> 2. Do you have any suggestions where to post my problem to get useful
> suggestions?  This is the only camera-related newsgroup I found on the
> internet.
>
> Thanks for the answers.
>
> Best regards,
>
> Marko

> Hi Marko,
> I think you have the correct newsgroup.
> I had similar sound problems a few years back with a Sony Digital 8, it was
> the video head that was worn and needed replacement.  (I hope yours is OK),
> try cleaning the head to ensure a good signal comming from the rotary head.
> The sound that came from the earphone socket in my case was normal and of
> good quality, it was only the sound that came through the Fire Wire that was
> affected.
>
> Try recording through a different program like WinDV or DVIO (both freeware)
> to eliminate a problem with VideoStudio
>
> Regards,
>
> Martin
>
>
> "Marko Pinteric" <ma***@pinteric.com> wrote in message
> news:EHE3g.2088$oj5.780061@news.siol.net...
>
>>Hello experts!
>>
>>I have JVC GR-DVL 140 digital camera with firewire exit and Ulead
>>VideoStudio 7 software.  Connecting camera to my personal computer
>>(notebook) was no big effort and when I was capturing two years ago I
>>didn't have any serious problems.  However, when I started another
>>capturing few days ago the quality of sound deteriorated significantly.
>>
>>Visual part of video is fine, there is no error in it, however metalic
>>noise pulses appear in the sound.  It seems that noise pulses appears only
>>when recorded sound is loud enough and possibly of appropriate frequency -
>>so this could be some sound loop problem.  In very noise parts of
>>recording noise pulses can appear even several times a second.
>>
>>I was trying to correlate the noise effect with various parameters, like
>>the number of electrical appliances working in the neighborhood, number of
>>cables etc.  The only working correlation seems to be the following: if
>>computer and camera are turned off for some time, there is significant
>>reduction of noise after they are turned on again.  After longer use noise
>>increases again.
>>
>>1. Do you have any suggestions how to solve this problem?
>>
>>2. Do you have any suggestions where to post my problem to get useful
>>suggestions?  This is the only camera-related newsgroup I found on the
>>internet.
>>
>>Thanks for the answers.
>>
>>Best regards,
>>
>>Marko
>
>
>

>
> 2. Do you have any suggestions where to post my problem to get useful
> suggestions?  This is the only camera-related newsgroup I found on the
> internet.
>
> Thanks for the answers.
>
> Best regards,
>
> Marko

> "Marko Pinteric" <ma***@pinteric.com> wrote in message
> news:EHE3g.2088$oj5.780061@news.siol.net...
>
>>Hello experts!
>
>
>>1. Do you have any suggestions how to solve this problem?
>
>
>
> If you are capturing via the 1394/Firewire port, then you are creating a
> bit-for-bit copy of the digital video data that's on the tape in the camera.
> It would be impossible to introduce distortion to the audio track.
>
> You might check your capture software and make sure that it is set to
> capture as DV-codec AVI.  If, for some reason, you've specified another
> codec or format, then transcoding may be a problem.
>
> Absent an incorrect codec setting for capture, the problem is either
> whatever you're using to playback the captured file on your computer, or
> it's a defect in your camera.  If other AV files play back without problems
> on your computer, it's definitely a camera issue.  It's hard to imagine a
> head-cleaning issue that would effect only the audio and not the video -- 
> it's all recorded as a single data "file," so you couldn't get corruption in
> one, but not the other.
>
>
>
>
>>2. Do you have any suggestions where to post my problem to get useful
>>suggestions?  This is the only camera-related newsgroup I found on the
>>internet.
>>
>>Thanks for the answers.
>>
>>Best regards,
>>
>>Marko
>
>
>