Avid Pro Audio Community

Avid Pro Audio Community

How to Join & Post  •  Community Terms of Use  •  Help Us Help You

Knowledge Base Search  •  Community Search  •  Learn & Support


Avid Home Page

Go Back   Avid Pro Audio Community > Legacy Products > 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac)

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 11-26-2008, 07:51 PM
ultrajoebot ultrajoebot is offline
Member
 
Join Date: Jun 2008
Location: Brooklyn, NY
Posts: 16
Default Session playing back at the wrong speed

A friend of mine recorded some drums for me using an older version of Pro Tools, and he had to set the session to 44k to save memory I think. I opened the session at home and it's playing slightly slower than it was recorded. Does anyone know how to adjust it so it will play back at the right speed? I feel like it's probably a pretty easy fix but I haven't been able to figure it out yet. Thanks!
Reply With Quote
  #2  
Old 11-26-2008, 09:36 PM
albee1952's Avatar
albee1952 albee1952 is offline
Member
 
Join Date: May 2004
Location: Norwich, CT
Posts: 39,408
Default Re: Session playing back at the wrong speed

If its playing slow, then I suspect it was recorded at 48K and you are trying to play it at 44.1. You should try importing the audio into a 48K session to see what happens.
__________________
HP Z4 workstation, Mbox Studio
https://www.facebook.com/search/top/...0sound%20works


The better I drink, the more I mix

BTW, my name is Dave, but most people call me.........................Dave
Reply With Quote
  #3  
Old 11-27-2008, 05:23 PM
ultrajoebot ultrajoebot is offline
Member
 
Join Date: Jun 2008
Location: Brooklyn, NY
Posts: 16
Default Re: Session playing back at the wrong speed

Hmm I tried starting a new 48k session and imported the recorded audio but it's playing back at the same speed. Could it be something else that's causing it to play slowly? I'd hate to have to record all the drums again but this hasn't happened to me before and it totally has me scratching my head.
Reply With Quote
  #4  
Old 11-27-2008, 05:57 PM
dogon dogon is offline
Member
 
Join Date: Oct 2007
Location: Melbourne, Australia
Posts: 169
Default Re: Session playing back at the wrong speed

Do you have another external (digital) device connected to your system that may be dictating the sample rate to Pro Tools?

or

Maybe, this was the case when you recorded.

Possible scenario.....
While recording, the session in pro tools could be set to one setting
But, if you are using a digital device (connected digitally) with PT in slave mode...
The session will run at the sample rate that the external device is set to, regardless of how pro tools is set (as it is slaving)

Fix
Import session data - and change sample rate on import

hope this makes sense
Hope this helps
dogon
Reply With Quote
  #5  
Old 11-27-2008, 06:35 PM
ultrajoebot ultrajoebot is offline
Member
 
Join Date: Jun 2008
Location: Brooklyn, NY
Posts: 16
Default Re: Session playing back at the wrong speed

Yeah, that totally makes sense. I don't think anything I have in place would be dictating the sample rate, unless the mbox does? I tried importing the session data every conceivable way (44 to 48, 44 to 44, 48 to 44, 48 to 48), but they all sound the same somehow. Huh. I think I'll check with the guy who recorded it and see if I can find out if anything else was wonky in the way it was tracked. Thanks for your help.
Reply With Quote
  #6  
Old 11-27-2008, 07:59 PM
dogon dogon is offline
Member
 
Join Date: Oct 2007
Location: Melbourne, Australia
Posts: 169
Default Re: Session playing back at the wrong speed

are you using the SRC (sample rate conversion) section of the import session data window?
Reply With Quote
  #7  
Old 11-29-2008, 04:45 PM
ultrajoebot ultrajoebot is offline
Member
 
Join Date: Jun 2008
Location: Brooklyn, NY
Posts: 16
Default Re: Session playing back at the wrong speed

Yeah, I've tried setting the source sample rate at 44.1 and 48 (and also the destinatoin sample rate), but both ways seem to yield the same result. Strangeness.
Reply With Quote
  #8  
Old 12-01-2008, 08:06 AM
David MacKenzie David MacKenzie is offline
Member
 
Join Date: Aug 2002
Location: Maryland
Posts: 26
Default Re: Session playing back at the wrong speed

I suspect that your friend recorded the session using an external clock source set to 48 KHz but the PT session was 44.1 KHz. So they are 48 KHz files that are set to play at 44.1 Khz. We've done that a few times when using external A-D's.

The best way I know of to fix that is a free program called Soundhack (from soundhack.com). Soundhack can edit the audio files' headers to change the sample rate field.

Consolidate your audio regions as much as you can, to minimize the number of audio files you need to fix. Remove any unneeded audio files from the session.

Save a copy of your PT session as 48 KHz in WAV format. You won't be using the converted audio files, just the PTF file. Also save a copy of the session at 44.1 in WAV format, because Soundhack only works on WAV files IIRC. We'll be running Soundhack on these 44.1 WAV copies of the audio files, to leave your original messed-up session untouched just in case something goes wrong.

Quit Pro Tools. Run Soundhack, Open a "44.1" WAV file from your session, and hit command-H or use the menu Hack>Header Change. In the Sample Rate box, replace "44100" with "48000" and click Apply. Close the audio file. Repeat for every audio file in your session.

Trash the Audio Files folder in your 48 KHz copy of the PT session and replace it with the Soundhack'd Audio Files.

Run Pro Tools and open the 48 KHz session. You may need to relink the audio files because their signatures won't match, but you should have what you need to get the session playing back at the correct speed, which is 48 KHz. This procedure is easiest when you haven't done much editing yet--the simpler the session, the less work to fix it.
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Session playing back at twice the recorded speed. horsearound 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac) 2 04-21-2011 04:35 AM
Playing back at wrong speed budinski 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac) 2 12-23-2010 08:05 PM
Help! PT session playing back at double 'chipmunk' speed. GUH???? jsbeeth 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac) 1 07-28-2009 10:48 AM
OT- itunes playing at wrong (faster) speed??? jlcnyc 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac) 6 01-27-2005 10:28 AM
Session playing back at double speed CFS 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac) 9 12-23-2000 12:45 AM


All times are GMT -7. The time now is 01:12 AM.


Powered by: vBulletin, Copyright ©2000 - 2008, Jelsoft Enterprises Limited. Forum Hosted By: URLJet.com