Problem, need help asap.. craclking from clipping?

U

USLatin

Panamaniac
I am using a MixPre in my closet/soundbooth with headphones for talent... when talking into the mic I hear these hoooorible crackles which seem to happen from clipping yet I don't have clipping going on, instead it seems they happen when the signal gets strong rapidly...

I had a pair of Sennheiser HD 280 pro 64ohms there but I tried my Sony MDR-7506'ers and same stuff...

In my NLE I don't hear these crackles and either headphones don't make said sound when playing back audio...

In the MixPre I don't have the gain turned up high, in fact it is very low and so are the headphones...

there are pictures of this setup in this thread:
http://www.dvxuser.com/V6/showthread.php?t=106048

please help me as I have our higher profile talent coming in in a few days and must make my Sept 1st deadline on this project. Thank you.
 
It's not in the recordings? Then I would guess a bad connection somewhere. Poss. in opts or switches but more likely in headphone jack. I'm assuming, though you don't say, that you are listening to the MixPre headphone jack. If it's being recorded then check mic cables.
 
I tried the stitches and cables... un-plugged it all and moved all switches then back to their positions... it seems now it is less pronounced I only got one... and it was by screaming :)

I guess it mist have been a cable? maybe a high-pass that was half way between two settings? ??

anyway thank you for the tip... it helped and I think I am good for now so I will go back to the other thread where Iam trying to improve my sound booth to be able to do ADR for a playground
 
ADR for a play ground? Does it have many lines ;~)

The basic sound troubleshooting list is.
1) plug it in (you would be surprised by how many things this fixes)
2) Turn it on (see above)
3) if the problem is loud snaps crackles pops hums and buzzes it is early in the chain before amplification. The louder it is the earlier it is in the chain.
4) if the problem is drop outs or low level it is usually toward the end of the chain after amplification.

So for instance a bad cable going to a speaker causes the speaker to be intermittent but a bad cable going to the amplifier creates big pops and buzzes.

There are exceptions but if you follow the above rules you will fix or find 99% of the problems. The least likly thing is equipment failure, though it happens. Cables and jacks and switches are all much more likely to be the problem.
 
Ok, sounds good. Thank you Noiz

The pops were LOUD... so I guess it could have been down at the booth before the MixPre... and all of that got re-connected and the problem seemed to go 95%... going to re-connect the mic itself and will post back if it persists.... if I don't then you fixed me up and gave me a great tip for the future ::thumbsup:
 
"Exercising" the connections (plugging and unplugging, switching back and forth) usually clears up contact problems. There is some amazing stuff from Caig Labs called DeOxit that also works well with the exercising.
 
Oh, do you mean that new connections might be prone to noise till they get some use? If so this might be the problem... nothing is more than 6months old here.

If you didn't mean that and you are only talking about "exercising" the connections to try to clear a problem when one presents itself the please clarify so I am 100% on the same page with you please.
 
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