I have spent a great deal of time recording an audiobook on Audacity but it has been rejected by Audible
The big issues are:
Issue: The following files do not meet our noise floor requirement (high pitched mechanical noise) – All Submitted Files
Requirement: a maximum -60dB noise floor
Solution: In post-production, you may use noise gating or reduction to help reduce the noise floor.
Can anyone advise me on how to use 'noise gating or reduction'
Issue: 19 files have a low RMS and are too quiet: Please see attached document for a graph of affected files.
Requirement: files measuring between -23dB and -18dB RMS
Solution: Please raise the overall RMS level of each file to within our requirement. For example, if a file's RMS is -30dB RMS, it must be raised +8dB to be within our -18dB to -23dB RMS requirement range.
I can not see anywhere on Audacity where you raise the db RMS - can anyone point me to where you do this?
Any help hugely appreciated!
Adam
Adio book rejected - need help!
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This forum is for Audacity on macOS 10.4 and later.Please state which version of macOS you are using,
and the exact three-section version number of Audacity from "Audacity menu > About Audacity".
Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.
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AdamPreston
- Posts: 14
- Joined: Tue Feb 26, 2019 3:00 pm
- Operating System: OS X 10.10 Yosemite
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kozikowski
- Forum Staff
- Posts: 68902
- Joined: Thu Aug 02, 2007 5:57 pm
- Operating System: macOS 10.13 High Sierra
Re: Adio book rejected - need help!
How did you record the work? Describe the microphone. Part numbers?
Were you following someone's recommendations for performing?
Have you ever installed custom tools or software into Audacity? We do publish audiobook mastering and analysis tools, but they need to be installed. The don't come with regular Audacity.
Do you still have your studio set up? Can you record a 20 second sound test?
http://www.kozco.com/tech/audacity/Test ... _Clip.html
This will give us first-person edivence of what's happening.
Koz
Were you following someone's recommendations for performing?
Have you ever installed custom tools or software into Audacity? We do publish audiobook mastering and analysis tools, but they need to be installed. The don't come with regular Audacity.
Do you still have your studio set up? Can you record a 20 second sound test?
http://www.kozco.com/tech/audacity/Test ... _Clip.html
This will give us first-person edivence of what's happening.
Koz
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AdamPreston
- Posts: 14
- Joined: Tue Feb 26, 2019 3:00 pm
- Operating System: OS X 10.10 Yosemite
Re: Adio book rejected - need help!
I have been given some encouraging news by the technician at ACX
He is now saying that the problem with noise floor is only in one chapter so re-recording that chapter is relatively easy
He is also saying the following:
In regards to the RMS issue - you simply need to raise the level of your files by 5 or 6 dB's to bring them in to our required level of -18 to -24dB
Be sure to keep a limiter set at -3dB to avoid peaking issues
I am sorry to be so unversed in all this but could someone show me where on the Audacity dashboard are the levers/buttons for changing the dB level? I have searched and searched! If I can get this sorted I think I am away!
Best wishes
Adam
He is now saying that the problem with noise floor is only in one chapter so re-recording that chapter is relatively easy
He is also saying the following:
In regards to the RMS issue - you simply need to raise the level of your files by 5 or 6 dB's to bring them in to our required level of -18 to -24dB
Be sure to keep a limiter set at -3dB to avoid peaking issues
I am sorry to be so unversed in all this but could someone show me where on the Audacity dashboard are the levers/buttons for changing the dB level? I have searched and searched! If I can get this sorted I think I am away!
Best wishes
Adam
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kozikowski
- Forum Staff
- Posts: 68902
- Joined: Thu Aug 02, 2007 5:57 pm
- Operating System: macOS 10.13 High Sierra
Re: Adio book rejected - need help!
We have RMS Normalize, but it's not included with Audacity. You have to download and install it.
After you use that, Effect > Limiter will suppress peaks that exceed -3dB.
Both of those tools are included in the ACX Audiobook Mastering process.
https://wiki.audacityteam.org/wiki/Audiobook_Mastering
As part of that process, we include ACX Check which will tell you if your chapter passes ACX without having to actually submit the work to them.
That's why I asked if you ever installed an Audacity tool or software before.
Koz
After you use that, Effect > Limiter will suppress peaks that exceed -3dB.
Both of those tools are included in the ACX Audiobook Mastering process.
https://wiki.audacityteam.org/wiki/Audiobook_Mastering
As part of that process, we include ACX Check which will tell you if your chapter passes ACX without having to actually submit the work to them.
That's why I asked if you ever installed an Audacity tool or software before.
Koz