gives me noise floors around -70
After mastering? That’s about right. I can do something similar with my H1n.
I’ve recorded and edited 13 hours to complete my novel and am about to send it on to Audible.
Did they pass a sound test or are you submitting cold? Submitting cold can be an adventure. “Thank you for your submission. We liked your reading, but there is an error you will now have to correct over 13 hours of work.”
You can submit a short sound test for their inspection.
I need to find advice on how to convert it all to the required mp3 format
Open each chapter WAV file and Export.
MP3 conversion is built-in to Audacity 2.3.2. If you’re using an Audacity version before that, you will need to add the Lame software. Audacity has been able to play MP3 forever, but making one was registered software until recently.
. It’s in my bathroom, actually, that, with a little calking around the door is surprising soundproof.
Those surprises are nice. I found the reason my tiny third bedroom looked a little funny was somebody in its history soundproofed it.
Did I show you the forum test process? It’s 20 seconds.
http://www.kozco.com/tech/audacity/TestClip/Record_A_Clip.html
Koz