Hi,
I’m currently trying to finish my ACX recordings. 
However on the tutorials I have done the following:
Select:
Effect>Filter curve>Manage>Factory Presets> Low roll-off for speech> OK.
Effect>Normalise Target RMS Level -20dB> OK
Effect>Limiter: Soft Limit, 0.00, 0.00, -3.5dB, 10.00, No> OK
When I click on ACX -Check, the recording fails, all perimeters are good except RMS. Any suggestions?
David
Audacity Audiobook Mastering guarantees Peak and RMS. You’re supposed to fail Noise.
You missed the first step, Select the whole track or show.
You need to have at least 3/4 second of pure background sound in your chapter or show. That’s you not moving or breathing. If you don’t do that ACX Check will not be able to give you an accurate noise measurement. Background Sound (or Room Tone) is built into the ACX submission standards, too, so we’re not just making that up.
Koz
If this still doesn’t come out right, record a 10 second sound test and publish on the forum.
https://www.kozco.com/tech/audacity/TestClip/Record_A_Clip.html
Do Not apply any effects, filters or corrections. Read it, Stop, Cut it to length if you have to, Export and post it here.
Read down the blue links. They’re really short.
Koz
I think I see it. Normalize and RMS Normalize are different tools. You need to install RMS Normalize as a plugin.
See: the top of the Audiobook Mastering instructions.
https://wiki.audacityteam.org/wiki/Audiobook_Mastering
Koz
Hi Kozikowski,
I tried all over the place but I cannot locate the download for RMS Normalise.
Have you got a link to it so i can attach it?
David
Go to the link in Koz’s previous post. There is link to the RMS Normalize plug-in in the first paragraph.
Scan down to Custom Tools.
Koz
Hi Steve and Koz,
Thanks for your help. I’ve downloaded the the RMS Normalise but now it throws the noise floor level off. Peak level seems fine, so how do adjust the floor level, it is currently reading -59.3. Sorry to be such a pain.
Hi guys,
I hope I’m not speaking too soon but I managed to achieve all ACX’s parameters at last on the one I have just done so fingers crossed I might be on my way. 
Thanks for your help.
Kind regards
DavidMCM52
now it throws the noise floor level off.
That’s normal. Home readers never pass noise.
Record a ten second voice test and post it.
Read down the blue links. They’re very short.
Do Not change anything. No filters, effects or improvements.
https://www.kozco.com/tech/audacity/TestClip/Record_A_Clip.html
Koz
Quick note, the technical specification requirement is step one. You also have to pass Human Quality Control. That’s where a person listens to your work for theater, voice quality and distortion.
You have to pass everything.
Koz
Hi Steve and Koz, Thanks for your help with the Audacity issues guys. I am now producing Audacity standards recordings. Two things that I also discovered; firstly, I was not getting through the test due to noise floor issues. The solution is to copy and paste a short silent part of the recording, eg if less than a second at beginning, copy and paste that silent section there and add it on to the beginning giving at least 1 second of loudness check facility and the end if there is around 2 seconds or less do the same here copy and paste that silence at the end to extend the end silence and voila the recording fits ACX requirements. Second, make sure that when the recording is highlighted as “Selected” ensure that the gain button is set at zero. Then save the recording and all should now be good.
David
voila the recording fits ACX requirements.
It solves ACX Check. ACX Check looks down the recording for the quietest portion and measures that. If your quiet portion is “fake,” it will give you a false reading. Same thing happens when people Generate > Silence and stick that on the beginning and end of the chapters instead of actual room sounds.
This presentation will likely fail Human Quality Control who will wonder how come the spaces between words are a lot noisier than the Room Tone at the beginning and end of the chapter.
Third Time. Record a ten second voice test and post it on the forum. Record it, cut it to length and post it. No effects, filters, or corrections.
https://www.kozco.com/tech/audacity/TestClip/Record_A_Clip.html
Koz