Audio Not Outputting Properly

J

Joe_Hicks

Well-known member
I'm having an issue with an audio track I'm adding to a timeline. The project has two audio tracks. Track one has a song ripped from a CD. Track two is a wind sound effect. The only audio effect I have added is minor "limiting" via the Dynamics effect.
When I output to AVI the music track "pumps." In other words the volume goes in and out. If I output the project without the wind effect, no problems. I have tried removing the "limiting," and reversing track order, but neither helped.

Anyone have any clue on this??

Thanks,
Joe
 
A "pumping" character is something that a poorly configured limiter can exhibit (inappropriate attack and release times). Apparently, the "limiting" effect isn't as minor as you would think. Personally, I would export these audio tracks and process them with a DAW (Adobe Audition is a good example) then bring them back into Premiere after processing.

Your extraction of the song, was it to an uncompressed file (.wav) or a compressed one (.mp3 .wma etc)?

By the way, I am assuming that you do have the rights to use the song that you have "ripped" from the aforementioned CD?
 
khmuse:
I've tried outputting the clip with the limiting removed-- so that's not the problem.

As far as the ripped track, it's in .wma format.
 
One of the annoying things about premiere pro is how it handles the audio. It is very CPU and RAM intensive. If your computer cant keep up you can expeirnce problems from popping int eh audio to effects to audio coming in in the middle of the clip causing the pumpoing effect you described. Even audio gain would be considered an effect in this case. If you export your audio track you will notice that it isnt in the actual data of the audio jus thte way its outputed What i do when i am printing to tape is:
1. Render out one audio and one video track so its less taxing on your CPU
2. If using an external monitor (including one hook up to a deck when printing to tape) make sure destop preview is turned off (it is a big CPU waster)
3. Make sure you close down as many other programs on the computer as you can (you can even try to set windows for beswt performance instead of nicest appearance.
4. If you are working with 24pa footage in a 24pa timeline, it is better to view it using the reapeat frame pull-up, it is less taxing on hte CPU as well.
5. If after all of this stuff you are still expieriencing the problem and it is obvious it is a performance issue, its time to upgrade.
 
Consider using an uncompressed audio format like wave (.wav). This too is less taxing and is noticeably better in quality.
 
Ok, I need a little audio 101 here. If I take a compressed audio file and re-save in an uncompressed format does the system now see it as uncompressed or compressed? (Sort of the same way graphics work-- save a jpeg as a tiff, it's now an uncompressed format but has lost some integrity along the way) Or do I need to go back to the original source and get an uncompressed version.

BTW, I did use Adobe Audition and corrected the problem. It's interesting, everything that was mentioned in this topic played a part in this:
- Premiere's limiting still caused me problems in Audition, so I removed it before exporting
- I've got wimp system, 2 gig Pentium 4, 1 gig ram, old USB bus, 76 gig HD, 1 ext 300 gig HD, and a wimp Video card GForce3 Ti 200 64 mb.

I'm currently in the process of spec-ing out a new system (I'll build myself) built around twin AMD Dual Core Opteron 280's, with a server level motherboard (Tyan K8WE), and 15K hard drives. I'm tired of render times, and issues such as these!

Thanks guys,
Joe
 
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