Audio tracks aiff/wave vs. ac3: considerable difference in volume. Why?

I realized that Ac3 audio files are consistently lower in volume compared to corresponding aiff or wave files.
It seems to be an ac3 own encoding process feature. Just wondering why it has been designed this way.....

You'd use it BECAUSE it's compressed, thus saving you valuable DVD real estate. An AIF file for your project that takes 800MB worth of space can be replaced by an ac3 file that sounds almost identical, yet takes up only 100MB (of course all this depends on the settings you use for the compression, but it's a close estimation)

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Hello.. I try to make copy an audio track(AIFF-C audio) on another dvd but I can't. I was try to made an ''burn folder'' with the audio track but did burn it. Please could someone help me?

Hello.. I try to make copy an audio track(AIFF-C audio) on another dvd but I can't. I was try to made an ''burn folder'' with the audio track but did burn it. Please could someone help me?

You appear to be having a hardware problem. Make an appointment at the Genius Bar of your nearest Apple Store to get a diagnosis.

New user: I can't find the zoom option (to try and sync audio tracks/sources wav to a clap)

Hi guys. I LOVE the rendering speed/quality etc of single videos but I'm running into trouble syncing videos/audio from 3 sources. Basically I have a Nikon D7000 and an Iphone taking two angles of me playing guitar. I want to sync all of them to an audio clap or a click but I can't seem to find the zoom option where I can get right in on the wav files to match the peaks of the clap. I am also having trouble with the video clips I am dragging seem to lock magnetically to other clips or wherever my playback marker is. I want the clips to drag/move freely (and tiny increments) and not lock into any time interval etc.
I also would like to find the mute button for some of the tracks. It seems to be really basic stuff, but I can't seem to locate anything obvious to zoom, drag and get my timeline in sync.
It took me a long time to sync my audio to an iphone angle for this clip:
http://youtu.be/4B9TMQg9KXQ?list=UUd_A29XG4JvzkyGNcuXcuiQ
My D7000 is a MUCH better image, but juggling that, my iphone angle and the audio that gets recorded by my DAW is a struggle. Any tips would be appreciated!

thefyn
Thanks for the reply with details of your Premiere Elements version and computer operating system.
1. Zooming in on clap in wave form of audio - assorted maneuvers
You could always change the audio track size, but that is not going to give you anywhere near the detail that you will get by
alt clicking the audio portion of the Timeline file (to temporarily unlink audio from the video and then double clicking that Timeline
audio file to bring up its waveform in the Preview Window and noting the clap time at playback there.
With the video and audio relink again, as you can hold down the alt key and tap the left or right arrow key, you can move the Timeline linked clip from right to left or left to right
for alignment purposes to the clap time.
When you need only the video portion of the video audio linked file in the Preview Windows, then you omit the alt click on the audio portion.
If needed, you could always set unnumbered markers at the Timeline level or in the Preview Windows.
For Timeline video audio nudges....as you hold down the alt key and tap the right or left arrow key once, you get a one frame nudge per tap.
As you hold down the Shift+Alt and tap the right or left arrow key once, you get a five frames nudge per tap.
On other matters...
2. Please look at right clicking the Timeline and looking a Snap option enabled and disabled.
3. I will think about it some more but I do not see any way to mute the audio for a whole audio track. You can mute the audio for clips on that audio track but not
shut off the audio to that one particular audio track. If you wanted to do audio clip muting for more than 1 clip at a time, I could see
a. copy first file that you muted through Adjust Tab/Adjustments/Volume Panel expanded and
b. then do a Paste Effects and Adjustments for a selection of all of the other audio files on that particular track.
Just some thoughts
ATR

Cannot Export Audio Track to DVD

I've edited a video using Premier CS4. Wanting to burn a DVD of the video, I choose File/Adobe Dynamic Link/Send to Encore, then select the settings I want, and click Build. So far so good, but when I play the resulting disc it has no audio track. Yes, the audio track is on in the Premier project.
I tried exiting the programs and then re-opening. I also installed all updates.
Any suggestions? Thanks.

W Vought,
One thing to consider is that Encore is designed to produce DVD-Video discs. What you are looking for, it seems, is a DVD-Audio disc. Is that correct?
One way to sort of accomplish this would be to Export>AME just your Audio to a WAV, or AC3 file. Burn that to a data DVD. You could try to create a dummy Audio_TS and Video_TS folder structure, place your AC3 into the Audio_TS folder and burn with ImgBurn, Nero, whatever. The Audio_TS is for DVD-Audio discs. Then a DVD player *should* be able to play the Audio, if it has the capabilities.
Another workaround would be to just put Black Video on you VT 1 and the Export to Encore. DVD-Video needs to have Video of some sort - Black Video qualifies as Video.
Now, I do not do DVD-Audio discs, so do not know which authoring sofrware you'd use. Neil Wilkes, a MOD in the Encore forum, does this all of the time, as its his main business. I'll bet he'd have suggestions on what you need to do.
Good luck,
Hunt

Sync multiple video clips with one audio track

I'm an FCPX noob, trying to sync some clips. I recorded a 1.5 hour concert with a DSLR along with an audio track using a separate digital recorder. I have seven video clips, all in sequence (stopping and restarting the camera because of clip length limitations) and one long audio track in WAV format. The audio track is longer than the combined video clips, and there are some short dead spaces in between the video clips when I turned off/on. Now I'm trying to sync them but when I do, the video clips get stacked together with lots of overlap.
I made a test with 3 minute video and audio clips and had no problem. But when I try to do the whole event, I get a jumbled mess.
I could cut the audio into pieces and sync each piece with its corresponding video, but that seems to defeat the sync process, as well as being a lot of work. And, wouldn't I end up with lots of overlap anyway, since my audio clips would have to be longer than my video clips?
Am I missing an easier way to do this, or a way to arrange things better? I can't imagine the problems with several cameras and several audio tracks; my project is actually pretty simple, since it is very linear.
Any suggestions? Thanks--

BobFromIN wrote:
Sorry to take so long getting back to you. Thank you for this advice, but I'm not sure I'm doing it correctly. Is there a way to set the angle on all of the clips at the same time?
Yes. Select all the clips you want in the browser, and then in the inspector fill in the camera angle with the value you want. This can be just about anything, it does not have to be a number. I prefer to name it something meaningful, like "wide" or something.

Using Quicktime Audio .mov As Audio Track

Hi folks.
I have an external microphone which I record into Quicktime as my audio track. Functions much better as audio for what I am recording.
My video is an independent HD camera, which I import afterwards into iMovie '09. I want to mute the camera audio, and use the microphone audio. How do I do that? It's a .mov, and I can only see it through using the iTunes importation, which is bad enough.
Do I have to translate to an MP3 first? I don't want to compress it.
Cheers

iM09 has the drag-n-drop feature that you can use with the 2nd video clip that has your audio, and simply select the "Audio Only option" when you drop it on your main clip. See if this resolves your problem.
Workaround is to convert it to any of the supported formats - AAC, MP3, etc. to use as a standalone audio track.
And don't forget to either manually reduce the volume (under Audio tab when you dbl-click the clip) of the unwanted audio track to zero, or use ducking to reduce volume of the alternate track.

Exporting audio tracks as AIFFs/WAVs to a DVD?

Hi all,
I am very new to fcp and trying to export the audio tracks (background noise, music, voices etc) from my completed edit, separately, in an uncompressed format to a DVD/CD. A file format like AIFF or WAV would be perfect. Can anyone tell me how to do this? Is it difficult? I have very little exp with final cut pro.
Any help appreciated.

Set an IN and OUT point in the Timeline for the section you want to export. Go to File->Export->Using QuickTime Conversion. When the export window opens, choose AIFF from the format menu then select the specs from the Options menu.
I recommend using Toast for burning, but you can do it in the Finder as well. NOTE: if you want to format the CD as an 'Audio CD' you can also do that with Toast or with iTunes.
-DH

Using compressor DVD Studio Pro 4 will only accept ac3 format in the burn process. ac3 makes a nnsense of the good sound delivered, 30% reduction in volume, auto volume levelling giving unwanted volume variations. Used to be able to burn using AIFF/WAVE,

AS Above. Edited in FCPX. Excellent sound file. Using Compressor 4 to DVD Studio 4. Wanting AIFF or WAVE sound for acurate sound.
Previously DVD Studio 4 has accepted AIFF etc and delivered sound as reuired. Now, during the burn process everything other than ac3 is declined as 'video bit rate too high', but will burn if the AIFF format is replaced with ac3 (which I presume meanss the 'video bit rate too high' is referring to the sound file)
The issue with ac3 format is the huge reduction in original volume and worse, the 'auto volume levelling' that makes a nonsense of the original soundtrack - with simply aweful unwanted variations in volume Throughout the the dvd.
I have tried everything I can think of to get around this. The 'volume gain' in compressor doesn't make any difference. Exporting just AIFF and the Video to DVD 4 doesn't make any difference, it always declines anything but the aweful sound ac3 delivers.
I have customers awaiting a musci DVD, not with thei quality I can't.
Cheers
Phil

The total video bit rate is determined by audio & video. Depending on what rate your video file was encoded at will determine how much room is left for audio. PCM(aiff/wav) audio requires a bigger piece of the pie. Video bit rate too high means your overall(video+audio) rate is going above 9Mbps which the format won't allow. The only way to use aiff would be to lower your video file's data rate. The length of your program is also a factor in all of this.
I had some problems in the past with using aiff instead ac3. Although there shouldn't be any issue I experienced playback issues on some players that couldn't be explained but were cleared up by ac3. I have been using the same specs as Dave's suggestion for almost nine years and have not had any issues with mix, quality, or levels.

Build - Generates an "NTSC DVD requires at least one AC3 or PCM Audio track"

I'm using the trial version to make my first DVD with Encore. All went fairly smoothly until I went to "build" the DVD and received the "NTSC DVD requires at least one AC3 or PCM Audio track..." message. I continued with the build and tested the DVD. All the audio was fine except for audio assigned to my menus via the audio section, assigned from the motion tab, was not heard on the DVD. The Menu audio did however sound good from the preview mode. The audio that I tried to use in the motion audio field, was from a M2P file from the same clip that worked fine on the DVD. The video field was not set to anything on the motion menu.
My questions are: 1) How do I clear the error? 2) How do I get the Audio on my menus?
(Not sure if this item belonged in the forum, the error forum, or the audio forum - Sorry).
I don't even know for a fact that the error message was tied directly to the menu. I'm sure its something basic that I just missed - Thanks.
Eric

Thanks you very much, now I will be able to sleep tonight. My editing system (Edius) had both the ability to export my sound track to PCM AIFF & PCM WAVE, which worked great for the sound on the menus, as well as an elementary stream (M2V) format which worked good for the main sound track. I looked in the Audio Forum to find out about the elementary streams. The end result is that my DVD build error cleared as well as getting audio on the menu.
Once again, thank you both for your help.

Track audio using AIFF

Hi, I have a client who claims to be using the aiff files of his compressed mpeg2 files(from compressor) in DVD Studio Pro for track audio. The key is that he says that he never compresses the aiff files to AC3 format. I can't seem to figure out how this is possible. Is it maybe that DVDSP is automatically converting the aiff down to ac3 when he builds the DVD? It just wouldn't fit otherwise. Also, I would imagine the bitrate for running a mpeg2 at around 6mbps along with the aiff would be too much for the DVD spec.
Any ideas?

No, DVDSP won't allow you to continue on. You will see from time to time posts here that run into that problem. They generally go something like this: "DVDSP stops in the middle of building with an error saying the bitrate is too high, what's up with that?" (forgive me for taking some liberty in the quote). What's happening is the user has aiff or wav for their audio, and somewhere in the video stream the two combined bitrates exceed the max allowed. It can be very frustrating, because it can happen anywhere in the stream, and you really have no idea where it's at. VBR encodes with DVDSP/compressor are the most notorious for putting bitrate spikes in the encode. CBR is better, but not immune. The solution is to either re-encode the video at a lower bitrate (not desirable, and takes a longer time and may or may not be low enough); or to compress the audio to ac3 (which generally gives enough 'head room' to get under the max allowed even if there are spikes).
The short answer to your question is that DVDSP won't allow you to make a non-compliant disc (based on bitrate allowances). It also is not very helpful in letting you know exactly where the problem is.
Jim

I-Tunes bit transparent? / Best Audio Grabber / AIFF vs WAV files?

I am trying to rip my CD's in the best possible quality. Somebody recommended EAC (http://www.exactaudiocopy.de/) as audio grabber, but it does not seem to exist for Mac's (I'm using a Macbook Pro).
What audio grabber can you recommend for the best quality files?
So far I have been ripping my CD's as AIFF files (44.1kHz, 16 bit, stereo). Would anyone recommend WAV over AIFF? Is there a difference in audio-quality?
Does anyone know whether i-Tunes is "bit-transparent", or whether it at all alters the data in any way shape or form when I use it to rip my CD's?
What I am trying to do is get the best quality file possible, and then go out directly to A high-grade DAC like the Benchmark (http://www.benchmarkmedia.com/dac1/) through toslink or USB.
Any suggestions how to get the best quality files? Does i-Tunes alter the date even if I send it out via toslink or USB? Is there a media-player that would give me a better quality?
Thanks so much for helping out, appreciate it!
Markus
macbook pro Mac OS X (10.4.8)

Apple Lossless?
iTunes Encoding Strategies
Regards,
Colin R.

HT3775 This file contains a track in the Dolby AC3 Audio (code "8192") format. You may need to install a QuickTime component for this audio format in order to hear the soundtrack of this file.

This message appeared and does this just mean I need to upgrade Quick time player? This file contains a track in the Dolby AC3 Audio (code "8192") format. You may need to install a QuickTime™ component for this audio format in order to hear the soundtrack of this file.

Luckily, there are DOZENS of video/media players and extensions avaliable for the Mac. Many of them are FREE, some of the better FREE ones are...
PERIAN (quicktime extension)
http://perian.org/
QUICKTIME 7.6.6
http://support.apple.com/kb/DL923
VLC media player
http://www.videolan.org/vlc/
NICEPLAYER
https://code.google.com/p/niceplayer/
And if none of those work, there is a possibility that those video files may be corrupted.

What can i do to fix the following : You may need an additional audio decoder to play the soundtrack of this file. This file contains a track in the Dolby AC3 Audio (code "8192") format. You may need to install a DirectShow decoder for this audio format i

You may need an additional audio decoder to play the soundtrack of this file.
This file contains a track in the Dolby AC3 Audio (code "8192") format. You may need to install a DirectShow decoder for this audio format in order to hear the soundtrack of this file.

Luckily, there are DOZENS of video/media players and extensions avaliable for the Mac. Many of them are FREE, some of the better FREE ones are...
PERIAN (quicktime extension)
http://perian.org/
QUICKTIME 7.6.6
http://support.apple.com/kb/DL923
VLC media player
http://www.videolan.org/vlc/
NICEPLAYER
https://code.google.com/p/niceplayer/
And if none of those work, there is a possibility that those video files may be corrupted.

WAV Audio Track 2 silent when rendered

Using CS4/ i7 & 8 gig ram.
Thanks so much for your help in the past. I've just noticed something strange.
On the past couple of projects, the following happens:
Using Bill's suggestion, I changed the mp3 over to WAV with Audacity. Everything works better. However, there is another issue.
I have imported a WAV music track into my project and placed it on audio track 2. When I first start further editing on the project, the audio from track 2 plays fine.
However, when I render the video, and audio render follows, track 2 does not play. Track 1 plays fine.
1. I can go to the preview panel and place the same audio file on track 3 and it will play fine................ or,
2. I can exit from PP and when I restart PP and reopen the project, the track 2 audio will play fine. If I do not render the audio when I render the video,Track 2 plays fine............
Why would rendering the audio shut off the sound????? Any way around this situation?
Tks, Tom B.

You do not need Audacity. Premiere has a feature called Render and Replace.
Is this rendering the timeline or exporting out of Premiere?
You can do whatever works best.
Select audio clip, go to Clip, Audio Options, Render and Replace. THis will render the audio part to a wave generated by Premiere.
See how that works.

No audio - audio tracks whited but wave forms there

I do not have the audio tracks disabled they are just white. I can see the wave forms but I get no sound when I play the sequence. How do I fix that? Rich

Hi Richard.
Have you Muted the tracks? If there is no Mute and Headphone symbol to the left of the audio tracks click the tiny Loudspeaker icon at the very bottom left of the timeline window. Tiny Loudspeaker and headphone icons should appear. These icons are in addition to the normal green loudspeakers.
If the LS icon is yellow it is Muted so click it to deselect.
Ian.

Audio tracks aiff/wave vs. ac3: considerable difference in volume. Why?

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