problem: high audio level at DVinfo.net

Go Back   DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony HDV and DV Camera Systems > Sony VX2100 / PD170 / PDX10 Companion

Sony VX2100 / PD170 / PDX10 Companion
Topics also include Sony's TRV950, VX2000, PD150 & DSR250 family.


Reply
 
Thread Tools Search this Thread
Old June 7th, 2004, 03:14 PM   #1
Major Player
 
Join Date: Aug 2002
Location: Brooklyn, NY
Posts: 642
problem: high audio level

shot a wedding reception yesterday. only second time, so i'm still learning out there. when i hooked up my pd150 to the wireless receiver to get sound from the dj's mixer, i noticed that the signal i was getting on that channel was extremely high (although AUTO GAIN was switched on). i had to set the channel's INPUT LEVEL to MIC ATT in order to get sound at a normal recording level.

first thing i tried to do is switch channels to see if the problem continues on the other channel. it did.

later, the next day, i tried hooking up a neck mic to the transmitter, to see if what happens. i had the same results i got from the dj's mixer - high sound level when set both to MIC and LINE. then i tried a completely different wireless audio device and different neck mic but the problem remained.

can't figure it out. anyone got a clue?

adi
Adi Head is offline   Reply With Quote
Old June 7th, 2004, 03:37 PM   #2
Regular Crew
 
Join Date: Jan 2004
Location: Bellevue, Washington
Posts: 145
Re: problem: high audio level

<<<-- Originally posted by Adi Head : shot a wedding reception yesterday. only second time, so i'm still learning out there. when i hooked up my pd150 to the wireless receiver to get sound from the dj's mixer,...-->>>

More than likely the dj was sending you a line feed. You need to have him send you a mic feed. Or he could have been sending you a very hot signal. Most of the audio people are concerned with analog with doesn't have the -10db limit that the digital world has. You can either have the dj send you a -10db mic signal or there should be a 'volume' control or attenuation control on your wireless receiver or a combination thereof.

HTH

Doug
Doug Okamoto is offline   Reply With Quote
Old June 7th, 2004, 04:32 PM   #3
Wrangler
 
Join Date: May 2002
Location: Vallejo, California
Posts: 4,049
If you hooked up to a wireless receiver and the level was too high, you have several choices. The first is to lower the level at the transmitter end.

Was it your wireless system? What brand and model?

In order, you should attempt to control the:
1 input signal level
2 input attenuation
3 sensitivity of the transmitter
4 output level of the receiver
5 input sensitivity of the camera
a line or microphone
b input attenuator
c level controls
__________________
Mike Rehmus
Hey, I can see the carrot at the end of the tunnel!
Mike Rehmus is offline   Reply With Quote
Old June 8th, 2004, 07:43 AM   #4
Major Player
 
Join Date: Aug 2002
Location: Brooklyn, NY
Posts: 642
thanks for the replies. from what you guys are saying, i understand that it's just a matter of setting the in/out levels and sensitivities. in a way, thats what i eventually did. i just set the the channel to MIC ATT and that did the job. for some reason, i thought this was not a very good solution and that this should not be happenning.
maybe what i should be asking is: what exactly does the CHANNEL INPUT LEVEL control do? and what actually happens when i switch from MIC to MIC ATT or to LINE and vice versa.

thanks.
Adi Head is offline   Reply With Quote
Old June 8th, 2004, 11:32 AM   #5
Wrangler
 
Join Date: May 2002
Location: Vallejo, California
Posts: 4,049
We have at least one person on the forum who has literally ripped these cameras apart at the schematic level and he can tell you technically what happens.

But basically you have a gain control and the other switches are really attenuators of different values.

Let me reiterate that adjusting these elements may be the wrong first step. Why? Because if the levels are that high coming from a wireless system, you may be approaching the upper limits there too. Like the camera, the wireless system can distort the audio when over-driven. So the best place to start is at the head of the audio string and get the levels into the proper operating range. In this case by adding attenuators or adjusting the input gain of the transmitter.
__________________
Mike Rehmus
Hey, I can see the carrot at the end of the tunnel!
Mike Rehmus is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony HDV and DV Camera Systems > Sony VX2100 / PD170 / PDX10 Companion

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 02:05 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network