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$
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I will master your audiobook to pass acx audio requirements
Molly K
About this gig
Did ACX reject your audiobook? I can fix it.
ACX doesn't reject files for sounding bad. It rejects them for missing numbers. RMS has to sit between -23dB and -18dB. Peaks can't exceed -3dB. Your noise floor has to be under -60dB. A good performance recorded in a quiet bedroom fails these constantly, and the rejection email doesn't tell you how to fix it.
Send me your files and I'll send them back passing.
What I do:
Bring RMS and peak levels into ACX's required range
Reduce your noise floor below the threshold
Remove hum, hiss, room resonance and background noise
Clean up breaths, mouth clicks and page turns
Top, tail and add correct room tone to every file
Deliver in ACX's required format, ready to upload
I spent four years engineering a weekly audio and video show. I built the studio and mixed and mastered every episode. Hitting a technical spec is something I have done thousands of times.
Send me one chapter first. I'll master it so you can hear the difference before you commit to the whole book.
Not sure how many finished hours you have? Message me and I'll put you in the right package.
Get to know Molly K
Molly K
Media Producer and Editor
- FromUnited States
- Member sinceSep 2026
- Avg. response time4 hours
Languages
English
Most podcasts and audiobooks don't stall because the person ran out of things to say. They stall because the editing piles up.
I spent four years producing and engineering a weekly audio and video show. I built the studio, ran the live streams, and mixed and mastered every episode. Before that, nine years at a medical device manufacturer as a technical business analyst, working inside HIPAA and Medicare rules.
I do full podcast post-production and ACX-compliant audiobook mastering. Send me your messiest file and I'll show you the difference.
FAQ
What if it still fails ACX?
I'll rework it free until it passes. That is the whole job.
What files do you need from me?
WAV if you have it, 44.1kHz or higher. MP3 works, but WAV is cleaner to work from and it is what ACX wants anyway.
Can you fix a bad recording space?
Usually. Send me a sample first and I will measure it and tell you honestly, including if it cannot reach spec by processing and the chapter needs re-recording.
What counts as a finished hour?
The length of the final audiobook, not your raw recording time. A 6 hour book is 360 finished minutes no matter how long it took to record.
