Iriver Sync Problem at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > All Things Audio

All Things Audio
Everything Audio, from acquisition to postproduction.


Reply
 
Thread Tools Search this Thread
Old February 9th, 2007, 02:22 PM   #1
Major Player
 
Join Date: Jun 2005
Location: Hamden CT
Posts: 470
Iriver Sync Problem

Hi, when I use an Iriver 895 with A pd170 and bring the footage to the editing board, the audio from the iriver goes out of sync with the pd170 footage every 15 minutes. I can fix this, but is this normal?

Is there a way to stop this by changing an iriver setting?

Or,

Is there a way to stop this by buying something else to replace the iriver?
Richard Zlamany is offline   Reply With Quote
Old February 11th, 2007, 10:38 PM   #2
Major Player
 
Join Date: Nov 2003
Location: ontario
Posts: 445
I have not had any sync problems with a variety of iRivers.I use 5 of them.
The method I have adopted is I set the iRiver to 44k 160kb mono or 320kb stereo (depending on your mic).
I transfer the iRiver file using the Manager , convert to mp3.Then load it into Sound Forge ,tweek the audio and export as 48k 16bit.
Drop it on the timeline and line it up.
If for whatever reason your audio is still going out of sync , just stretch it to match.
I know there was a problem if I left it as a MP3.If you judge the sync by ear(not the waveform), my computer was doing some converting while playing the 2 files back and it would sound out of sync.If I prerendered before viewing, it was ok.
Jack Smith is offline   Reply With Quote
Old February 12th, 2007, 12:56 AM   #3
Major Player
 
Join Date: Jun 2005
Location: Hamden CT
Posts: 470
Thank you Jack for answering.

Maybe I had the sync problem because I didn't convert the mp3 file to a 48k 16 bit wave file before putting it into the timeline. I used the 44k 160kb mp3 file that the iriver software made and put it directly into a DV 48k timeline.

I'll do a test to see if this makes a diiference.
Richard Zlamany is offline   Reply With Quote
Old February 12th, 2007, 05:34 PM   #4
Trustee
 
Join Date: Aug 2003
Posts: 1,483
Quote:
Originally Posted by Richard Zlamany
Hi, when I use an Iriver 895 with A pd170 and bring the footage to the editing board, the audio from the iriver goes out of sync with the pd170 footage every 15 minutes. I can fix this, but is this normal?
Yes, this is normal.
Dave Largent is offline   Reply With Quote
Old February 12th, 2007, 07:24 PM   #5
Major Player
 
Join Date: Jun 2005
Location: Hamden CT
Posts: 470
Dave what causes this?

Is it because I am not converting the mp3 file to a wave file with the same properties as the edit timeline?
Richard Zlamany is offline   Reply With Quote
Old February 12th, 2007, 07:31 PM   #6
Trustee
 
Join Date: Aug 2003
Posts: 1,483
Quote:
Originally Posted by Richard Zlamany
Dave what causes this?

Is it because I am not converting the mp3 file to a wave file with the same properties as the edit timeline?

No, nothing like that. It's just the way they are.
They don't keep perfect time, like you might
find with a watch. They use cheaper components
that are "good enough" for how most folks
use them.
Dave Largent is offline   Reply With Quote
Old February 12th, 2007, 07:36 PM   #7
Major Player
 
Join Date: Jun 2005
Location: Hamden CT
Posts: 470
I see. Thanks for explaining.
Richard Zlamany is offline   Reply With Quote
Old February 13th, 2007, 09:07 PM   #8
Major Player
 
Join Date: Nov 2003
Location: ontario
Posts: 445
Richard, I'm wondering if you tried what I suggested and did that work?
I have heard a lot of others say they have sync problems and yet doing it my way I don't.
Are you judging sync from the timeline or after rendering?
Jack Smith is offline   Reply With Quote
Old February 14th, 2007, 06:34 AM   #9
Trustee
 
Join Date: Oct 2003
Location: Rio de Janeiro, Brasil
Posts: 1,137
The iRiver only records in MP3? Can't you record in PCM?

If it doesn't, then the PD170 may be much better, because it's PCM, no compression of any kind.
Carlos E. Martinez is offline   Reply With Quote
Old February 15th, 2007, 04:00 PM   #10
Major Player
 
Join Date: Jun 2005
Location: Hamden CT
Posts: 470
I tried converting the mp3 file to a wave file and matching the properties, but the sync problem still occurs. I notice it every 15 minutes.

The Iriver 895 only records Mp3. I do use the pd170's audio, but for events I usually use more than two mics, so I use 2 895 Irivers.


Is there a similiar device to an Iriver that does not do this?

Last edited by Richard Zlamany; February 16th, 2007 at 12:13 AM.
Richard Zlamany is offline   Reply With Quote
Old February 15th, 2007, 09:52 PM   #11
Trustee
 
Join Date: Aug 2003
Posts: 1,483
Quote:
Originally Posted by Richard Zlamany
Is there a similiar device to an Iriver that does not do this?

Not that I know of.
Dave Largent is offline   Reply With Quote
Old February 16th, 2007, 03:27 AM   #12
Trustee
 
Join Date: Oct 2003
Location: Rio de Janeiro, Brasil
Posts: 1,137
Quote:
Originally Posted by Richard Zlamany
I tried converting the mp3 file to a wave file and matching the properties, but the sync problem still occurs. I notice it every 15 minutes.
Then the iRiver and/or camera is not reliable to keep sync for more than 15 minutes.

Quote:
The Iriver 895 only records Mp3. I do use the pd170's audio, but for events I usually use more than two mics, so I use 2 895 Irivers.
Why not use a mixer and feed it all on the PD170. Or better yet use another HD or CF recorder, like the Microtrack 24/96, Roland R-09 or Zoom H4?

Quote:
Is there a similiar device to an Iriver that does not do this?
Probably those above, recording in PCM.

But the problem may also be in the PD170. Can you check using two cameras and see how sync behaves?
Carlos E. Martinez is offline   Reply With Quote
Old February 16th, 2007, 01:01 PM   #13
Major Player
 
Join Date: Jun 2005
Location: Hamden CT
Posts: 470
Thank you Carlos for your help. The Pd170 keeps in Sync with many other cams. It is only the Iriver.

I'll check out the other recorder solutions.

I have done a forum search and see that there are a few others who have noticed this problem with the Iriver 895.

Thank you.
Richard Zlamany is offline   Reply With Quote
Old February 16th, 2007, 11:03 PM   #14
Trustee
 
Join Date: Aug 2003
Posts: 1,483
Quote:
Originally Posted by Richard Zlamany
The Pd170 keeps in Sync with many other cams. It is only the Iriver.

My experience as well.
Dave Largent 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 > The Tools of DV and HD Production > All Things Audio

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 09:05 AM.


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