|
|||||||||
|
Thread Tools | Search this Thread |
July 6th, 2012, 09:27 PM | #1 |
Regular Crew
Join Date: Feb 2009
Location: Los Angeles, CA, USA
Posts: 148
|
audio rumble noise with Sony HXR-NX30U
Wasn't sure where to post this, but this seems like the closet forum, mods please move if it's in the wrong place.
I've been having issues over the years using external mic's on cameras, always with excess noise captured by the mic. I've returned many mics/cameras over the years because of this so this time instead I tried ordering an all in one figuring that would work better, which is the Sony HXR-NX30U. I received it yesterday, I figured since they included a mic that it's all designed to work together well and I'd get no noise. Alas I'm still hearing noise, so at this point I figure it must be me but I just can't figure out for the life of me how to get clean audio from this thing. For tripod or documentary type purpose where the camera doesn't move, the mic is fine. But most of my filming is random run and gun, so I'm holding the camera and moving around. In this situation I'm constantly hearing some kind of low frequency rumbling noise. I've tried holding the camera by it's handle while recording, and using a rig I have but I still hear that noise. I put a short recording of it here at this link: http://www.realitystudiollc.com/audioissue.mp4 Video quality is low to make the file small, but you can hear the issue in the audio. There was no wind at all, that rumbling you hear just seems to be coming from, well, I don't really know where. Even when I film indoors it's the same, anytime the camera is moved you hear that rumbling noise which makes it totally useless for my purposes. I tried setting "low cut" on the mic but that didn't solve it, tried manual mic levels and that didn't work either. How do you guys get clean audio from external mics? I've always just used the internal camera mics because after trying countless external mics I just could never get noise free audio so I gave up, but I figure there must be a way. The stuff I film is like reality shows basically, so one camera moving around and no separate audio guy holding a boom mike, it all must be self contained on the video gear which is why I was hoping the NX30U would finally solve my issue but it didn't. Anyways I'm going to keep playing with the camera, but I'm grateful for any suggestions! |
July 6th, 2012, 10:44 PM | #2 |
Major Player
Join Date: Nov 2010
Location: Northridge, CA
Posts: 280
|
Re: audio rumble noise with Sony HXR-NX30U
I've done a lot of work with my NX70U that has the same mic/audio handle and haven't experienced that. Running through plastic curtains and other stuff that rubs and bumps the mic, still comes out without that noise.
Only thing I can think of is that you have a defective mic. Might be some part loose inside that's bumping around as you move. |
July 7th, 2012, 04:04 AM | #3 |
New Boot
Join Date: Mar 2012
Location: Orlando, Fl
Posts: 21
|
Re: audio rumble noise with Sony HXR-NX30U
Sounds like your mic is picking up noise from the camera body. I would try and isolate whats happening. For instance grab a headset so you can hear whats going on real time. Turn the camera on, doesn't matter if its on a table top or a tripod. Then touch and lightly tap the camera body and see if the mic is picking that up.
The ECM-XM1's boom mic is the same as the one I have on my camera. I use one channel with the boom mic and the second with my wireless mic. If the ECM-XM1 isn't connected properly the audio defaults to the onboard mic on the camera and if thats the case here maybe you're getting sound from the camera body's own internal mic. |
July 7th, 2012, 02:41 PM | #4 |
Regular Crew
Join Date: Feb 2009
Location: Los Angeles, CA, USA
Posts: 148
|
Re: audio rumble noise with Sony HXR-NX30U
Hi guys, ok I tried your suggestion Bryan, the mic definitely seems to be picking up even the slightest touch on the camera or the camera rig. Here's a pic of the mic mount on the camera:
http://realitystudiollc.com/images/nx30/6.jpg Those 8 round things are rubber grips that hold the mic tightly, is it possible those are transmitting that rumble I'm hearing? Here's a pic of the entire camera with the mic mount: http://realitystudiollc.com/images/nx30/1.jpg ...and here's a pic on a small rig that I use: http://realitystudiollc.com/images/nx30/7.jpg So when listening with headphones, even when I run a finger along the camera rig that I use I hear it being picked up by the mic. I have the mic setup as the manual suggests, it says set att at 10db for that mic, and put it in the mount with the mic model numbers displayed on top. I played with some of its settings, trying auto mic level and setting it manually, as well as trying the "low cut" setting that it has but in every case I still hear audio noise. Unfortunately for my needs I can't use a boom mike or anything like that, it's all for reality style filming by one person. So I guess I need a better rig or mic mount to isolate it more? |
July 7th, 2012, 03:00 PM | #5 |
Trustee
Join Date: Oct 2006
Location: Antrim, Northern Ireland
Posts: 1,569
|
Re: audio rumble noise with Sony HXR-NX30U
I've got exactly the same XLR block on my NX70 (and mic, I presume), and I don't have too many problems with handling noise, but it takes a lot of care.
These are my thoughts, coming from an NX70, not an NX30. It's still possible that there's a fault with your mic, without handling it myself I can't tell. It's been exactly the same with my previous three cameras (Sony and Panasonic) with similar mic clips. It's way too easy to transmit handling noise to the microphone. Running fingers along the camera rig or camera body will create vibrations, and transmit it to the microphone. I'd need to see exactly what's happening to the camera to work out what the noise is. Also, with just the stock foam cover on the mic, it's very susceptible to wind noise - just panning or moving the camera quickly will create rumble as well. To stop handling noise transmitting to the mic, the best thing is to get the mic mounted in a proper suspension that isolates the mic from the camera body, like a Rycote Lyre-type mounting (other brands exist, but, bluntly, they aren't as good - I've wasted money on them). |
July 7th, 2012, 04:11 PM | #6 |
Inner Circle
Join Date: Jan 2004
Location: Boca Raton, FL
Posts: 3,014
|
Re: audio rumble noise with Sony HXR-NX30U
It sounds to me like handling noise.... noise that travels through the rig to the mic. Is it possible you have the shotgun mount too tight? You want the shotgun to be suspended in the rubber. It will wobble a little but only within the suspension.... and not hit the hard mount. Rubbing the cable can also cause handling noise.
|
July 8th, 2012, 01:39 PM | #7 | |
New Boot
Join Date: Mar 2012
Location: Orlando, Fl
Posts: 21
|
Re: audio rumble noise with Sony HXR-NX30U
Quote:
You've got me wondering if the boom mic is engaged? When you run your fingers across the body also see if the boom mic is working by running your finger across the boom mic itself. |
|
July 8th, 2012, 04:47 PM | #8 | |||
Regular Crew
Join Date: Feb 2009
Location: Los Angeles, CA, USA
Posts: 148
|
Re: audio rumble noise with Sony HXR-NX30U
Quote:
Quote:
Quote:
Overall I'm still very happy with this camera though. It's definitely a step up fromt he 560v's that I've been using. I think what I'll do for now is use the shotgun mic for all tripod style footage that I record, because the audio quality from that mic when on tripod is actually really good. For the run and gun stuff I'll stick with the internal built in mic that is lesser quality but doesn't have the rumble issue, at least until I can find a shock mount or rig that is able to isolate the shotgun mic from finger movements. |
|||
| ||||||
|
Thread Tools | Search this Thread |
|