I can try to register again in my room, the problem is I got a flat 20square meters, in the UK unfortunately the quality of building are terrible basically.
You can hear a lot of noise from the neighborood. But the other books I’ve done I did in the same flat with the same hardware.
I’m not using audacity to recorder because my laptop fan is too noizy and I prefer use a sony voice recorder.
I will try to register them again 
has Dynamics issue (too compressed) if the problem is overload? Is this overload make compression?
The short answer is yes. One of the reasons taxi radios, aircraft radios and police radios sound like they do is clipping and overload. Distortion sounds loud. The goal of these radios is to sound loud and dense and get their messages through. They should not have any volume variation or expression.
The goal of audiobooks is to have a perfect, clear, theatrical performance voice. My joke is listening to someone telling you a fascinating story over cups of tea. Not ordering a cab or landing a plane.
My stand-alone recorders all have a way to set recording volume and most of them have a simple sound meter. Which recorder are you using? Model numbers? You might just have it turned up too loud.
I have all the parts needed to build a simple, tiny sound studio with hardware store plastic pipes and blankets, heavy towels or furniture moving pads. It knocks down for storage. Any second now I’m going to build it and take pictures.
One of the other posters pointed us to a performer who threw a blanket over himself and recorded a test that way. It sounded great, but you can’t breathe after a while. So something a little bigger than that for the home reader.
Koz
I shot this on a stand-alone voice recorder. This is the story-teller, conversational tone.
It’s clear, noise-free, sounds just like me and passes ACX Check after mastering.
Koz
I’m using this
I did put the low volume settings already before do the recording.
https://www.sony.co.uk/electronics/voice-recorders/icd-px240
is any hardware I can buy to create a environment like your audio?
what about this test? I did mastering again from the raw file, sounds the same?
How did you shoot the first book?
Koz
Do you mean the Spanish one? The first my post I did last month?
If yes, same voice recorder, different flat (my Spanish neighbor flat) carpet floor
Audacity mastering suggestions!
That’s it.
I lowered the volume of the microphone, then I’ve put a foam on top of this, is rudimentary solution but it sounds quiet better? 
What is that test before you did anything to it? We should hear the raw sound file.
Mastering hides sound damage and we don’t know what to tell you if somethings goes wrong. The audiobook people are searching for performances that sound like somebody is trying to cover up damage.
Koz
I could not tell from the Sony instructions how to set recording volume. They tell me there is another instruction manual inside the recorder and they do not publish it on-line. I know the volume control on the outside of the recorder is for playback. It says that. There is no mention of setting recording volume.
The foam is a good idea, but too much foam can cause your voice to sound muffled like you have a towel over your face.
Koz
There is another problem with your recorder but I’m ignoring it. The recorder is MP3 only (one of the reasons it’s so affordable) and has a maximum MP3 sound quality of 128. So far so good. That’s the quality that ACX wants you to deliver. The problem is Audacity Mastering, or any correction lowers the bitrate. You can’t edit a 128 performance and end with a 128 show.
You either have to start with a quality higher than 128 or use WAV format and convert to MP3 later. That’s how my recorders work.
Regular WAV sound files have a quality of 2822 stereo, 1411 in mono. Way higher than your recorder. Sometimes people don’t notice you’re violating the rule and that will be our secret.
Koz
Koz basically I’m exporting MP3 audio at 320 not 128 if that could be better?
All the file you’ve heard from me they’re 320 !!!
yes there is a set up to put the volume low, which I did already. For now I’m recording all those file again with the foam, I will master and send to ACX again, then I will improve my audio quality, I will buy another microphone, unfortunately I can’t recorder with my laptop on because the fan is very noisy. I need something very quiet. May be a good microphone, + an ipad + garage band to send the audio file into it could be good?
All the file you’ve heard from me they’re 320 !!!
Excellent. I can’t tell that from the information Sony publishes outside of the recorder.
yes there is a set up to put the volume low
Terrific. Again, that information is not available to me.
I will master and send to ACX again
Before you do that, I am constructing a tiny sound studio that fits on a dinner table. You will need that to help with your kids playing outside and dogs barking…and room echoes. When it got dark this evening, I was up to a quick test construction on the table in the back yard.
I’m making it from home store plastic pipes and furniture moving pads. That’s it. I build a little tunnel with the pipes and then throw the blankets over it. Put the recorder inside and listen to the room (neighborhood) noises go way down.
I need to write down the measurements and the parts list.
If you’re in a metric country, you’ll need to figure out what “Half-Inch PVC Pipe” looks like. And cut the pipe. It’s possible a good hardware store may do it for you. I’m trying to make the construction as simple as possible, but sooner or later, you’ll have to cut the pipe. It comes in 2M or 3M lengths.
As we go.
Koz
Thanks Koz, take a PVC pipe cut it and put the recorder inside is quiet simple for me. I got all tools need to cut it. Good Idea
anyway now I did record again those chapter, even because this audiobook is about 27 chapters and just 11 of them got rejected.
I did the record early morning when it was really quiet.
Anyway I would like to have a solution like your audio cheapest as possible because now I’m not making any money from ACX and I got
just a normal food delivery job haha!!!
I will master and send to ACX again
ACX wants all your chapters to match.
I did the record early morning when it was really quiet.
That leaves room echoes.
I can give you the basic ideas very fast.
1/2" PVC Plastic Pipe.
72" by 80" Heavy Furniture Moving Pads.
Four PVC Corners.
Cut the pipe into 8 lengths, each 20". Push the pipe and corners together into a square cave.
Throw furniture moving pad over it to cover top and three sides. Put the microphone in the middle and talk into the open side.
– Next improvement is two pads and lay one pad on the table under the cave. You should do this one!
– Next improvement is three pads and throw two pads over the cave.
– Next improvement is four pads and hang one pad on the wall behind you.
And that’s as good as you can do with plastic pipes and furniture moving pads.
You are making one of these.
One poster tried blankets from his bed and it didn’t work right. They’re not heavy enough.
Koz
Kitchen Table Sound Studio
Revision 1
This is the parts list for the studio. Each of those eight plastic pipes is 20 inches long. No special parts or celebrities. They’re half-inch PVC. Four corners, four end-caps and two heavy 80" x 72" furniture moving blankets.
This is the frame construction. No glue.
This is the finished studio. The pipes have end caps and the table has a cover, folded over.
It’s pretty amazing. You can stick your head in there and listen to the world vanish. That’s the end of room echoes.
It’s not soundproof. It’s sound resistant. I can still hear the house construction next door. Hard to ignore that jackhammer.
The pads are 72" by 80". They’re heavy. Each of mine weighs 17 lbs, but the more common 6 lb to 8 lb will work. Lighter is not good. We’re not after comfort or low shipping weight. We’re after dead weight. The sound has to move those pads to get in.
No glue. When you’re done using it and you need the kitchen table back, knock it apart and slide it under your bed.
Pipe notes: My Home Depot will sell me 24" PVC pipes pre-cut. You can use those and not have to cut anything, but you have to be careful to place the top pad so the 80" dimension is sideways. The top pad must meet the table on all three sides.
Koz
dear Koz I got approved without build that scenario which was looks amazing!!!
Thank you,
Now I have a new challenge, I’m try to improve the quality, I would like to use a mac book pro
I got this quality which sounds no bad, just audacity tell me is out of RMS standard level
Other stuffs are ok, what I could do? You won’t believe how I achieved this quality
thanks Koz with the new microphone and record with a third part software, then master with audacity I got approved straight away
and the quality is much better.
I still have some echo background but is much much better.
It made me pretty pleased to see the success. Which mic did you end up purchasing?