Koz, I did another chapter this morning and did not apply noise reduction because after I had done the first three steps, the ACX check everything passed .... so I skipped the noise reduction and completed the chapter and did the exports as directed. When I finished everything, ran another ACX check and everything passed ...... again without using the noise reduction.
Later today or tomorrow I'll do another chapter and see if the same holds true after the Audiobook Mastering (i.e., everything passes the ACX test without applying noise reduction). If that's the case, I'll go ahead and apply Noise and see what ACX then says and specifically to which area. Stand by and I'll let you know.
Peak and Floor levels
Forum rules
This forum is for Audacity on Windows.
Please state which version of Windows you are using,
and the exact three-section version number of Audacity from "Help 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.
This forum is for Audacity on Windows.Please state which version of Windows you are using,
and the exact three-section version number of Audacity from "Help 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.
-
kozikowski
- Forum Staff
- Posts: 68902
- Joined: Thu Aug 02, 2007 5:57 pm
- Operating System: macOS 10.13 High Sierra
Re: Peak and Floor levels
Noise isn't a Pass/Fail thing. You should pay attention to the actual numbers. The ACX Noise limit is -60dB. As long as your noise numbers are quieter than, say -65dB, you should be good to go.
viewtopic.php?p=384351#p384351
If most of your noise settles around -62dB or -63dB, that's too close to the limit and you risk having some chapters make it and some not.
When you run ACX Check after mastering, what are your noise dB numbers?
Koz
viewtopic.php?p=384351#p384351
If most of your noise settles around -62dB or -63dB, that's too close to the limit and you risk having some chapters make it and some not.
When you run ACX Check after mastering, what are your noise dB numbers?
Koz
Re: Peak and Floor levels
Just finished a new chapter and ACX was:
Peak 3.4
RCM 20.3
Noise 70.3
Peak 3.4
RCM 20.3
Noise 70.3
-
kozikowski
- Forum Staff
- Posts: 68902
- Joined: Thu Aug 02, 2007 5:57 pm
- Operating System: macOS 10.13 High Sierra
Re: Peak and Floor levels
Then you don't need additional noise reduction at all.Noise 70.3
If you can do that and sound OK, that's all it takes.
Koz
Re: Peak and Floor levels
Koz, a related question. Once I'm done with a chapter (editing and all) I end up with three files:
- a wav file
- an Edit Master wav file
- and an MP3 file
Do I need to keep all 3 files on hand or just the Edit Master and MP3 ???
- a wav file
- an Edit Master wav file
- and an MP3 file
Do I need to keep all 3 files on hand or just the Edit Master and MP3 ???
-
kozikowski
- Forum Staff
- Posts: 68902
- Joined: Thu Aug 02, 2007 5:57 pm
- Operating System: macOS 10.13 High Sierra
Re: Peak and Floor levels
That first file is your raw reading, right?
I would keep all three, but the throw-away is the MP3. You can't edit it or change it without causing sound damage. You can make a new MP3 from the Edit Master and you can make a new Edit Master from the raw reading. No question keep the first two. I still have raw readings and delivered WAV masters from years ago.
Be able to point to two different places that have your Edit Master. Inside your computer and USB thumb drive as an example. Second places can be external drives or cloud storage—or another computer.
Two different folders in your computer does not count.
Koz
I would keep all three, but the throw-away is the MP3. You can't edit it or change it without causing sound damage. You can make a new MP3 from the Edit Master and you can make a new Edit Master from the raw reading. No question keep the first two. I still have raw readings and delivered WAV masters from years ago.
Be able to point to two different places that have your Edit Master. Inside your computer and USB thumb drive as an example. Second places can be external drives or cloud storage—or another computer.
Two different folders in your computer does not count.
Koz
Re: Peak and Floor levels
Koz, thanx for tip above ... I have everything backed up on an external hard drive and also on Compuserve
Now a question:
When you gave me the Hum link, I had already recorded a couple of chapters. Can I go back to those particular chapters, go to the Edit Master and retroactively apply the Hum removal effect and then save as a v2 Edit Master and a v2 MP3... or will that affect something else? In those chapters, the noise level currently is ok by ACX standards (around -65 or so) but with the hum removed it jumps to mid-70's
Now a question:
When you gave me the Hum link, I had already recorded a couple of chapters. Can I go back to those particular chapters, go to the Edit Master and retroactively apply the Hum removal effect and then save as a v2 Edit Master and a v2 MP3... or will that affect something else? In those chapters, the noise level currently is ok by ACX standards (around -65 or so) but with the hum removed it jumps to mid-70's