You defeat the AGC if you feed a constant audio tone to one channel.
DQS
On Mar 21, 2012, at 2:05 PM, John Kilgour <john@digitalcut.com> wrote:
> Sounds like someone was trying to trick the DSLR Audio AGC with the 'ol tone trick. Google it, i can't explain it
>
> On Mar 21, 2012, at 1:45 PM, Lou Wirth wrote:
>
>> So what I discovered is that this high frequency tone does live within the audio tracks of these clips. My Flanders was the only monitor that could catch it. But when I fast forward the clip in the Avid, the tone is there. Sound designer looked at the clip and found it carries a high level frequency that you can roll off with EQ. But her Pro Tools shows it. Stuff shot on 5D.
>>
>> Lou
>> On Mar 20, 2012, at 4:21 PM, Lou Wirth wrote:
>>
>>> Okay. It was a tone coming out of my flanders which just got a firmware upgrade. Odd though that it only came up on these interviews and nothing else I've played back today. but the volume was up at default level so when I pulled it down it went away. It was such a shrill I assumed it came from my playback speakers.
>>>
>>> Live and learn
>>>
>>> Lou
>>> On Mar 20, 2012, at 4:15 PM, Lou Wirth wrote:
>>>
>>>> I am trying to import MVI.mov files from a Hard Drive. Client shot on 5D. I already have lots of his stuff for this doc. These are some interviews he did. shot at 1080/23.97. The interviews play fine in Quicktime. I import into After Effects and they play fine. But when I import into MC 5.5 I get a tone under the audio in channel one. Clearly there, loud enough to hear and for it to register on the Audio tool at about +6. It was not on a broll shot from the same interview when it was imported. Only on the interview. But as I said, no tone is heard when you play the original file. Only 2 tracks of audio, and track one has the tone after it comes into Avid. Sound engineer next door is very perplexed.
>>>>
>>>> Any ideas as to what is going on? Tape shot same rate as project.
>>>>
>>>> thanks
>>>>
>>>> Lou
>>>> Lou Wirth Productions
>>>> 500Tamal Plaza, Suite 522
>>>> Corte Madera, CA 94925
>>>> www.louwirth.com
>>>> 415-924-9411p
>>>>
>>>>
>>>>
>>>
>>> Lou Wirth Productions
>>> 500Tamal Plaza, Suite 522
>>> Corte Madera, CA 94925
>>> www.louwirth.com
>>> 415-924-9411p
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> [Non-text portions of this message have been removed]
>>>
>>>
>>>
>>> ------------------------------------
>>>
>>> Search the official Complete Avid-L archives at: http://archives.bengrosser.com/avid/
>>> Yahoo! Groups Links
>>>
>>>
>>>
>>
>> Lou Wirth Productions
>> 500Tamal Plaza, Suite 522
>> Corte Madera, CA 94925
>> www.louwirth.com
>> 415-924-9411p
>>
>>
>>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Search the official Complete Avid-L archives at: http://archives.bengrosser.com/avid/
> Yahoo! Groups Links
>
>
>
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