Audiobook WAV File Cleanup

Posted 2 days ago

Only freelancers located in the U.S. may apply.U.S. located freelancers only

Summary

I need assistance with preparing my book for distribution as an audiobook. I will record the book chapters on separate WAV files as per the attached 'Audiobook Recording Checklist'. I anticipate that there will be approximately 6 - 8 hours of recording time. I need an EXPERIENCED audio editor to do edit and master the files to ACX standards, at minimum. The task involves improving the audio quality to ensure clarity and professionalism. The ideal candidate should have experience in audio editing and be able to deliver high-quality results efficiently. See additional editing/production detail below. MINIMUM REQUIREMENTS: - RMS loudness between -23 and -18 dBFS, - True peak below -3 dBFS, - Noise floor below -60 dBFS, - 44,100 Hz sample rate, mono, - MP3 at 192 kbps CBR, - 0.5 to 1 second of head silence, and 1 to 5 seconds of tail silence. To be included within contract: - If any delivered file fails ACX's automated technical QA check, the editor will remaster and redeliver that file at no additional charge. - Two (2) rounds of creative/technical revisions included for things like EQ preferences or pacing. NOTE 1: Stated hourly rate (below) is the (Per Finished Hour) PFH of final audio rate and is dependent on skill/experience level. NOTE 2: ACX measures true peak using 4x oversampling, not just sample peak — so please master with real headroom, not just skim under -3dB. • Each file should contain only one chapter or section — opening and closing credits go in their own separate files, and every file needs to be uploaded in chapter order: Opening Credits, Chapter 1, Chapter 2, and so on through Closing Credits. • The retail sample (what customers preview on Audible) needs to be 1–5 minutes long and should start with narration itself, not the "Chapter One" announcement or any music. • My target is -20dB RMS NOTE 3: RMS is measured across the entire file including silence padding, so a long tail silence can pull measured RMS lower. Please check final RMS on the exported file, not an intermediate mix.

  • Less than 30 hrs/week
    Hourly
  • < 1 month
    Duration
  • Intermediate
    Experience Level
  • $50.00

    -

    $100.00

    Hourly
  • Remote Job
  • One-time project
    Project Type
Skills and Expertise
Mandatory skills
Audio Editing
Audio Production
Nice-to-have skills
Audio Post Production
Activity on this job
  • Proposals:5 to 10
  • Last viewed by client:yesterday
  • Interviewing:
    1
  • Invites sent:
    8
  • Unanswered invites:
    6
About the client
Member since Oct 29, 2025
  • USA
    Middle River9:43 PM
  • $262 total spent
    1 hire, 1 active
  • 19 hours

Explore similar jobs on Upwork

Sound Mixing
Audio Editing
Music Arrangement
Piano
Islamic Podcast editingHourly‐ Posted 3 weeks ago
Podcast Editing
Video Editing
Podcast Production
Social Media Management
Audio Editing
Audio Post Production
Podcast
Podcast Cover Design
YouTube SEO
Video Post-Editing
Podcast Show Notes
Scheduling
CapCut
Adobe Audition
Canva

How it works

  • Post a job icon
    Create your free profile
    Highlight your skills and experience, show your portfolio, and set your ideal pay rate.
  • Talent comes to you icon
    Work the way you want
    Apply for jobs, create easy-to-by projects, or access exclusive opportunities that come to you.
  • Payment simplified icon
    Get paid securely
    From contract to payment, we help you work safely and get paid securely.
Want to get started? Create a profile

About Upwork

  • Rating is 4.9 out of 5.
    4.9/5
    (Average rating of clients by professionals)
  • G2 2021
    #1 freelance platform
  • 49,000+
    Signed contract every week
  • $2.3B
    Freelancers earned on Upwork in 2020

Find the best freelance jobs

Growing your career is as easy as creating a free profile and finding work like this that fits your skills.

Trusted by

  • Microsoft Logo
  • Airbnb Logo
  • Bissell Logo
  • GoDaddy Logo