firewire audio levels at DVinfo.net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders > Canon GL Series DV Camcorders

Canon GL Series DV Camcorders
Canon GL2, GL1 and PAL versions XM2, XM1.


Reply
 
Thread Tools Search this Thread
Old July 31st, 2003, 09:43 PM   #1
Major Player
 
Join Date: Jun 2003
Location: Oklahoma City, OK
Posts: 389
firewire audio levels

I have a few projects recorded on dvcam and would like to transfer those to minidv (my school uses sony, i have a canon). Today I used one of the school's sony camcorders as a source vtr and firewired into my gl2. The video turned out just fine, however the audio was severly over modulated. The levels on my gl2 were almost constantly past the limit. At first, of course, I blamed the school equipment and used an actual editing vtr as my source. The same thing happened. The only thing I could think of was to change the settings to audio att on, and audio dub in. Neither of those made a difference - i would imagine they refer to the a/v input and not the firewire.
So, to make a long question short... is there any way to regulate the firewire audio record level of the gl2?
Also, this is the first time I've tried dubbing to my gl2, does this happen often? or could it maybe be due to the different speed of dvcam?

thanks
nicholi
Nicholi Brossia is offline   Reply With Quote
Old August 8th, 2003, 04:39 PM   #2
New Boot
 
Join Date: May 2003
Location: Taranto Italy
Posts: 14
Nicholi

Hello,

there's one thing missing in your post:
how is the SOURCE audio level?

Can you see the audio level on DVCAM vtr?

If the source audio level is normal, then there should not be any reason for the two levels to be different.

The signal is transmitted via firewire and received with the same standard on the other side.
So, unless there's something different between DVCAM and
mini DV, the two levels should be the same.

I don't think that the different speed has something to do with your problem.

As you mentioned, the attenuators on GL2 have effect only on audio inputs.

Anyway, as I don't know any hardware capable to modify the signal on firewire, you could do the following to solve the problem:

import the project in a PC using a video editor (i.e. Adobe Premiere), then modify the audio level and finally export the new obtained project to miniDV.

This should work fine if the original audio is not distorted.

Let me know....

Ciao

M. Lauria
Mario Lauria is offline   Reply With Quote
Old August 8th, 2003, 05:33 PM   #3
Wrangler
 
Join Date: Sep 2001
Location: Northern VA
Posts: 4,298
GL2 levels past the limit? What limit? How are you jduging the levels? If using earphones or analog output you may need to change the analog output level.

What gear were the original tapes made on.

To check levels, try firewire the tape back to the Sony gear and you should see the levels the same as the original. ALso, if you capture with an NLE you should be abel to judge the recorded level and see whether or not the waveform is distroted/clipped.
__________________
dpalomaki@dspalomaki.com
Don Palomaki is offline   Reply With Quote
Old August 8th, 2003, 09:48 PM   #4
Major Player
 
Join Date: Jun 2003
Location: Oklahoma City, OK
Posts: 389
Yeah, I actually feel pretty dumb. Yesterday, I almost drove myself crazy trying to fix the problem when it ended up being super high levels on the original tape. I'm guessing that firewire can't be regulated at all (through a mixer or something), and if it does I don't have the equipment, so I'm going to have to figure out some other way of getting the audio dubbed. The video looks good. At least I have that much.
I guess I was just making a mountain out of a mole hill.
Nicholi Brossia is offline   Reply With Quote
Old August 9th, 2003, 06:55 AM   #5
Wrangler
 
Join Date: Sep 2001
Location: Northern VA
Posts: 4,298
The Videonics MXProDV video mixer with Firewire I/O may allow adjustment of audio levels.
__________________
dpalomaki@dspalomaki.com
Don Palomaki 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 > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders > Canon GL Series DV Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 10:36 AM.


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