FORUMS: list search recent posts

audio sizzle in video recording

COW Forums : Audio Professionals

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Larry Brewer
audio sizzle in video recording
on Aug 7, 2013 at 12:10:27 am

Has anyone ever experienced an annoying audio sizzle in an audio recording caused by a low battery in a wireless mic receiver? This is NOT a constant hiss, and not really a clipping sound at the peaks, but a white noise type sound that rides on top of each spoken word. Overall this is a very quiet recording. the sound is more like what you hear on your FM car radio when you are parked in a dead spot.

Anyway, I can chop off the high end and drop everything above 1.5khz and lose most of the interference, but I also lose most of the sibilance. Resulting in a somewhat muffled sound.

Any protools suggestions? Audacity? Sound forge?

Thanks in advance.

Larry Brewer


Return to posts index

Ty Ford
Re: audio sizzle in video recording
on Aug 7, 2013 at 2:52:17 am

Hello Larry and welcome to the Cow Audio Forum.

Can you post a chunk and point us to it?

Regards,

Ty Ford
Cow Audio Forum Leader

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide
Ty Ford Blog: Ty Ford's Blog


Return to posts index

Larry Brewer
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 3:06:50 am

6373_audioexport.wav.zip


Return to posts index


Ty Ford
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 3:57:20 am

Larry,

First thing I'd check would be whether you inadvertently left the Phantom Power on when you plugged in the wireless receiver.

Second thing I'd check is interference. Sounds like you may not have been the only person on that frequency. Go back to that location, turn on the receiver, but not the transmitter. If you were on the same frequency as when you were there for the problem, you may hear SHHHHHHHHHHHHHH. That's someone else operating on that frequency. Retune the receiver until you don't hear the SSSSSHHHHHHHH then tune the transmitter to that new frequency.

Regards,

Ty Ford
Cow Audio Forum Leader

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide
Ty Ford Blog: Ty Ford's Blog


Return to posts index

Larry Brewer
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 4:13:24 am

The file was sent to me so I have no access to either the location, mic, xmitter or receiver. My role in this is "post screw-up". Typical noise reduction does not work since the sizzling does not occur during the space between words but rides on top of just the dialog.

Any suggestions regarding a noise reduction filter?


Return to posts index

Larry Brewer
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 4:22:26 am

I do appreciate your suggestions and will relay those back to the hapless camera operator.

My experience makes me believe she was operating just past the range limit of an inexpensive wireless system.


Return to posts index


Ty Ford
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 12:05:04 pm

Larry,

Could be that, depending on which side of the range she was on. :)

Which wireless?

Even good wireless can sound bad in the conditions I mentioned.

Regards,

Ty Ford
Cow Audio Forum Leader

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide
Ty Ford Blog: Ty Ford's Blog


Return to posts index

Richard Crowley
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 3:43:27 pm

It sounds to me like the wireless receiver needs repair. It is almost like a "soft squelch" letting in receiver noise, but only during speech. It is tough to try to remove broadband noise like that after the fact.

This is why we never use wireless where a wired mic would work. A $15 cable is better than a $1500 wireless kit. It is also why we CAREFULLY monitor and meter the audio as we are recording it. This is general admonishment, clearly Mr. Brewer is only trying to clean up after the fact.


Return to posts index

Larry Brewer
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 4:18:07 pm

I've been informed that this was an Azden wireless system. Very inexpensive. A fresh battery apparently did the trick. So in addition to other shortcomings of this system, it apparently is a battery hog.

Like I said in an earlier post, I've rolled off the top end at about 1.5K and that removed all most all the sizzle but left the sound a little muffled. However it will just have to do. Bury it in the music mix.

I'm sending the shooter a Lectrosonic UHF system to finish this project.

Thanks for all the good advice!


Return to posts index


Ty Ford
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 5:06:28 pm

Larry,

Maybe a battery hog, but people who buy Azden to begin with seem to be the type who might try to squeeze every joule possible out of a battery and buy cheap batteries as well.

Regards,

Ty Ford
Cow Audio Forum Leader

Want better production audio?: Ty Ford's Audio Bootcamp Field Guide
Ty Ford Blog: Ty Ford's Blog


Return to posts index

Richard Crowley
Re: audio sizzle in video recording (w audio file)
on Aug 7, 2013 at 8:45:21 pm

This is the kind of report that maintains Azden's poor reputation.

There used to be "Aphex Aural Exciter" gadgets which purported to add even harmonics back into "flat" audio. Dunno if they are still around (or if there are software plug-in equivalents?)


Return to posts index

John Fishback
Re: audio sizzle in video recording (w audio file)
on Aug 11, 2013 at 7:32:02 pm

The hardware exists vintage and new. And there's a Waves plugin, too.

John

MacPro 8-core 2.8GHz, 16 GB RAM, OS 10.7.4, QT10.1, Kona 3, Dual Cinema 23, ATI Radeon HD 5870, 24" TV-Logic Monitor, ATTO ExpressSAS R380 RAID Adapter, PDE enclosure with 8-drive 6TB RAID 5
FCS 3 (FCP 7.0.3, Motion 4.0.3, Comp 3.5.3, DVDSP 4.2.2, Color 1.5.3)
FCP-X 10.0.7, Motion 5.0.6, Compressor 4.0.6

Pro Tools HD 10 w SYNC IO & 192 Digital I/O, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec DSP Monitors, Prima CDQ120 ISDN


Return to posts index


Peter Groom
Re: audio sizzle in video recording
on Aug 7, 2013 at 9:48:57 pm

Can you post a bit
Peter

Post Production Dubbing Mixer


Return to posts index

Larry Brewer
Re: audio sizzle in video recording
on Aug 7, 2013 at 10:02:19 pm

6373_audioexport.wav.zip


Return to posts index

Peter Groom
Re: audio sizzle in video recording
on Aug 7, 2013 at 10:05:08 pm

Ill have a listen in the studio tomorrow
Peter

Post Production Dubbing Mixer


Return to posts index


Larry Brewer
Re: audio sizzle in video recording
on Aug 7, 2013 at 10:05:11 pm

Peter, if you go back to the third post in this thread you'll find a link to a 20 sec audio file.


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]