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Wireless Mic Issue

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joseph wilkins
Wireless Mic Issue
on Apr 25, 2007 at 6:13:07 pm

I just shot a corporate video where my talent is both voicing over the video from a nice sound booth with a great sounding condenser mic, then the video cuts to footage of her in the field, being mic'd with a $600 senheiser UHF mic. It sounds pretty weak in comparison and is pretty noticable.

I know it is what it is and not much I can do in post. But is there advice you can give me to try and lessen the gap in quality between the two?

Many thanks


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Ty Ford
Re: Wireless Mic Issue
on Apr 26, 2007 at 12:11:03 am

You mean in this sitution or in the future?

If it's the difference that bothers you, enh, it would bother me, but it happens all the time in TV news, so people are fairly forgiving.

In the future, I'd use a good boom mic like a Schoeps CMIT shotgun or cmc641 supercardioid. Then use the same mic in the booth. You'll have to make EQ adjustments, but you'll be in the same ballpark.

OTOH, you could downgrade and use the same lav in both situations.

Regards,

Ty Ford

Ty Ford's "Audio Bootcamp Field Guide" was written for video people who want better audio. Find out more at http://home.comcast.net/~tyreeford/AudioBootcamp.html
or http://www.tyford.com
Download Ty Ford's "Existential Boogie" from iTunes now.


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joseph wilkins
Re: Wireless Mic Issue
on Apr 26, 2007 at 2:44:04 pm

No, I mean is there a filter I can use on it?...


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Ty Ford
Re: Wireless Mic Issue
on Apr 26, 2007 at 3:09:43 pm

Maybe to some degree, but that's not something I could explain without being there.


Regards,

Ty

Ty Ford's "Audio Bootcamp Field Guide" was written for video people who want better audio. Find out more at http://home.comcast.net/~tyreeford/AudioBootcamp.html
or http://www.tyford.com
Download Ty Ford's "Existential Boogie" from iTunes now.


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Rodney M
Re: Wireless Mic Issue
on May 19, 2007 at 10:54:01 pm

Well, that is a common problem. One way to lessen the gap is to use a better RF mic system. The Lectrosonics 411 is about as close as you're going to get quality wise to using a hardwired mic. The 411 is a digital hybrid, but is also rather pricey (about 3 grand). Also upgrade the lavalier mic to something of better quality. I've found that the Sanken COS-11 is one of the better sounding lav mics out there. It's not always my first choice, but it has a frequency response that is a bit more appealing to me than other lav mics. Using a Schoeps to boom with will get you the closest to a studio condenser mic. Or you could boom with a Sennheiser 416 and record vo with the 416 in the studio.

As far as post is concerned, you would have to EQ your condenser mic to match the sound of the lav, which I can't really recommend. The RF system you are using can't match the frequency response of the studio condenser. You can't EQ in what you don't have.



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Ty Ford
Re: Wireless Mic Issue
on May 20, 2007 at 1:17:50 am

Welcome to the Creative Cow audio forum Rodney.

The newer digital wireless mic systems offer some interesting possibilities. Both the Lectrosonics and Zaxcom use digital technology and as a result, the audio takes a bit longer to get in and out of the system. That latency, when combined with a non-digital wireless system, can produce about a 3 mSec difference that can be perceived as a phase wash in some situations.

Sound travels at about a foot per second. That makes the arrival time of audio to a digital lav and a boom (which might be 2-3 feet away about the same. No problem. With two lavs, one digital, one analog in intimate two shots, you may hear the delay. Farther away than about three feet, the inverse square rule takes over and minimizes or eliminates the latency problem.

Regards,

Ty Ford

Ty Ford's "Audio Bootcamp Field Guide" was written for video people who want better audio. Find out more at http://home.comcast.net/~tyreeford/AudioBootcamp.html
or http://www.tyford.com
Download Ty Ford's "Existential Boogie" from iTunes now.


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Rodney M
Re: Wireless Mic Issue
on May 20, 2007 at 1:37:08 am

Thanks for the welcome, Ty.

That's good info regarding "phase" issues when mixing analog and digital systems. I haven't switched over to the 411s yet. My 210s haven't let me down, though they're not as convenient. "If it ain't broke, don't fix it."

And I think you meant to say that sound travels at about a foot per millisecond.



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Ty Ford
Re: Wireless Mic Issue
on May 20, 2007 at 1:51:00 am

That's what I get for taking a nap after dissembling a really BIG shrub today. You are correct. Sound travels at 1 foot per millisecond.

Regards,

Ty

Ty Ford's "Audio Bootcamp Field Guide" was written for video people who want better audio. Find out more at http://home.comcast.net/~tyreeford/AudioBootcamp.html
or http://www.tyford.com
Download Ty Ford's "Existential Boogie" from iTunes now.


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