Audio problems - please help

A

Averdahl

Well-known member
Hi!

I am new to this forum and not a DVX100 user but would like to have some help from DVX100 users. :)

I have bought a Panasonic DVC30 and have some trouble with the audio. When i record audio from the 3.5 mm mic input or via the XLR-adapter (AG-MYA30) the camera add a ~17dB boost at ~140Hz and boosts ~26dB (left channel) and ~18dB (right channel) at ~15.6KHz.

When i record through the built-in stereo microphone the sound is ok, no boost at ~140Hz or ~15.6KHz. The problem goes away if i use the built-in mic, but i don't want to use that mic...

I have recorded with different mic's, different XLR adapters and have experienced the exact problems even with another DVC30 camera. It seems to be a problem with the DVC30, but does this happen to DVX100 users?

So, my question is if anybody of your DVX100 cameras adds the same frequencies to your audio?

I have two sound samples, one second each, so you can download and listen and see in a frequency analysis what i am talking about. The .zip file is 203kB and can be downloaded here: http://members.chello.se/averdahl/DVC30_soundsamples.zip

I appreciate any input regarding this problem from you! :)

Kind regards, Roger
 
I don't have any experience with the DVC30 so I can't directly answer your question, however, I would add that if this is the true characteristic of this camera, it is highly unusual. In order to confirm your problem, I would recommend recording a line level signal into the camera's input. A sine sweep would be best, but even spectrally flat noise would be fine as well. Then analyze the capture and look for anomalies in the amplitude response. If present, then I would contact Panasonic and ask about this, as I stated, this would seem to be very unusual.
 
khmuse said:
In order to confirm your problem, I would recommend recording a line level signal into the camera's input. A sine sweep would be best, but even spectrally flat noise would be fine as well.
Click to expand...
khmuse, thank you for replying! :)

I generated noise in Adobe Audition, white, pink, and brown plus a sine sweep and recorded each one of them through the Line In and i got the same results... :cry:

So, i guess i have to take the camera back to the store and describe the issue. I sure hope that not all DVC30's has the same problem. I have tested two with the same problem already...

/Roger
 
If present on two cameras, it might be intentional, but I can't think of a good reason why. If it were just used to compensate the on camera mic, that would make sense, but to have the filtration present in the line path is irrational.
 
You must log in or register to reply here.
Back
Top