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Author Topic: Can someone identify this noise for me? - Figured it out...I think!?!?  (Read 1420 times)

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Offline Cheesecadet

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Lokking for someone's expertise to help me identify what type of static noise this is in the right channel?

http://we.tl/pHE2umojzE

Is it a possible faulty XLR cable, RFI, Faulty Capsule, loose connection somewhere maybe?

I do not think it is a capsule because I recorded another show a couple weeks ago and there was no noise present on that recording.  Thought I would inquire here.

Thanks for any and all help in trying to determine what this may be.

Ryan
« Last Edit: March 12, 2016, 10:52:33 AM by Cheesecadet »
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Offline EricM

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Re: Can someone identify this noise for me?
« Reply #1 on: March 06, 2016, 01:35:35 PM »
I'm going to guess and say RFI from a cell phone. Were you moving around much during the show? I had a problem recently from standing and sitting down a few times at a show. It tugged on my connections and caused similar sounds. I actually lost my R channel for most of the recording.

Offline Cheesecadet

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Re: Can someone identify this noise for me?
« Reply #2 on: March 06, 2016, 04:21:22 PM »
Thanks for your reply. This was an open taping situation so there was no jostling of cables from moving around.

Not really sure what RFI sounds like or if it is staticky or like a radio signal or both?

Thought maybe loose or dirty connections possibly? Would love more insight of anyone can provide it.

Thx
AKG481's > Hi Hos > Naiant MPD-12 > Shure FP24 > Schoeps SCH-501 1/8" > Sony PCM-M10
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Offline edtyre

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Re: Can someone identify this noise for me?
« Reply #3 on: March 06, 2016, 05:15:13 PM »
I had sounds like that one on some of my recordings that i determined
were caused by the in-house wi-fi network at the venue. The one that the artists use.
I had used these networks before and my Iphone automatically connected since they dont have passwords.
Since i put my phone in airplane mode at every show now, i haven't had any problems.


music>mics>pre>recorder

Offline Cheesecadet

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Re: Can someone identify this noise for me?
« Reply #4 on: March 06, 2016, 08:05:40 PM »
I should also mention it only occurs in right channel. Is that normal for RFI or would it normally effect both channels? 

It does not last the entire show either.

EDIT:
I just tested my whole chain again in my hotel room and there is no static in either channel.  Jostled theXLRs and everything and the signal is crystal clear.  I am hoping this was just a fluke and thankfully I was running another rig as well so there is an unblemished copy.  I would like to know what this could be though if anyone has any ideas or possibly something they have come across either on TS.com or youtube/elsewhere.  Maybe you have had something similar before and were able to figure out what caused it? 
« Last Edit: March 06, 2016, 10:43:15 PM by Cheesecadet »
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Offline eman

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Re: Can someone identify this noise for me?
« Reply #5 on: March 07, 2016, 04:24:46 PM »
I have a problem like this in my Mutron Phasor. I have been unable to locate it. The fact that you cured it with cable jostling makes me think it's a connection problem. Perhaps my next step will be replacing the jacks in the unit, maybe that's what you need do as well. I replaced all of my electrolytic capacitors, didn't help, cleaned pots, touched up solder joints.
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Re: Can someone identify this noise for me?
« Reply #6 on: March 09, 2016, 07:15:40 PM »
could be a dirty connector... Tried Caig DeOxIt?
http://store.caig.com/s.nl/sc.2/category.292/.f
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Offline Gutbucket

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Re: Can someone identify this noise for me?
« Reply #7 on: March 09, 2016, 08:58:48 PM »
Sounds like jostling cables didn't fix or create noise so I doubt its a connector, but clean your connectors anyway, that's cheap and easy and may need to be done anyway. If it occurs again, swap the mics only, not the cables or anything else in the signal chain and see if the noise switches sides along with the microphone.

Moisture or dirt/smoke-film on the diaphragm of a condenser mic can cause a similar static like sound.  If it's humidity or moisture, it often goes away after the mics warm up and drive the moisture off.  Store them with some desiccant for a while to be sure they are completely dry. I had a Microtech Gefell mic exhibit a very similar type of static noise, which was aggravated by humidity, and needed to send it back to the factory for reconditioning.  Came back as good as new though.
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Re: Can someone identify this noise for me?
« Reply #8 on: March 09, 2016, 10:53:15 PM »
Sounds like jostling cables didn't fix or create noise so I doubt its a connector, but clean your connectors anyway, that's cheap and easy and may need to be done anyway. If it occurs again, swap the mics only, not the cables or anything else in the signal chain and see if the noise switches sides along with the microphone.

Moisture or dirt/smoke-film on the diaphragm of a condenser mic can cause a similar static like sound.  If it's humidity or moisture, it often goes away after the mics warm up and drive the moisture off.  Store them with some desiccant for a while to be sure they are completely dry. I had a Microtech Gefell mic exhibit a very similar type of static noise, which was aggravated by humidity, and needed to send it back to the factory for reconditioning.  Came back as good as new though.

Thanks to everyone for the continued input.

I did travel from Denver to San Diego to record the show so the whole moisture angle might be it. 

I seemed to have eliminated the issue now but I will report back after next shows to see if anything reoccurs.

Ryan
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Offline deadahead93

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Re: Can someone identify this noise for me?
« Reply #9 on: March 11, 2016, 02:13:25 PM »
Is this noise in your 480's?

If so, check the tiny little screws on the bottom side of the mics, back where you connect your XLRs. If those screws get lose, they will make it sound like a bad connection. I had an issue with mine after last summer and it was driving me nuts!!! Can't remember who, but someone here on TS told me to tighten these screws... once I did, back to normal ;)

Thought maybe this would help.
Cheers Ryan!
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Offline Cheesecadet

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Re: Can someone identify this noise for me?
« Reply #10 on: March 12, 2016, 10:52:09 AM »
Think I got it figured out...it appears that the pad switch on one of the mic bodies was not totally in place at "0".  I toggled those switches a bit and made sure they were in place where they should be and the static is gone.

I will continue to test to be sure but I think that was the culprit.

Thanks for all the feedback!

Ryan in CO
AKG481's > Hi Hos > Naiant MPD-12 > Shure FP24 > Schoeps SCH-501 1/8" > Sony PCM-M10
DPA 4061's | AT853's (SC, C, O) | Tinybox | PIPsqueak | Darktrain/GAK | Audition CS6 | iZotope

10/25 Magic Beans
10/26 Magic Beans
11/03 Frank Potenza Trio
11/09 African Guitar Summit
11/29 Elephant Revival (?)
12/15 Kimock
12/16 Kimock

 

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