Narration Studio’27

Mastering & delivery

Master it, check it, deliver it.

Pick where the book is going. Narration Studio handles the numbers, checks them, and builds the files.

Mastering

Pick where it’s going. It handles the numbers.

Choose a preset and the whole chain is set for that platform: cleanup, leveling, loudness and the limiter. You can hear it while you play, adjust any stage or turn it off, and press Check for a pass or fail report that says why, before you export.

  • Live loudness meter (LUFS, RMS, peak)
  • True peak measured to ITU-R BS.1770
  • Speech leveler
  • De-esser and compressor
  • Automatic noise gate that keeps room tone
  • Your own VST3 plug-ins
The Mastering panel set to the ACX / Audible preset, with the high-pass filter, hum remover and plosive softener stages.
Mastering presets and their targets
PresetTargetsFile
ACX / AudibleRMS −23 to −18 dB, peaks ≤ −3 dB, noise floor ≤ −60 dB44.1 kHz MP3, 192 kbps
Spotify Audiobooks (Findaway)Same as ACX44.1 kHz MP3, 192 kbps
Penguin Random House−18 to −16 LUFS, true peak ≤ −1 dBTP, room tone kept between −80 and −60 dB44.1 kHz 16-bit mono WAV
Podcast−16 LUFS, peaks ≤ −1 dB44.1 kHz MP3, 128 kbps
YouTube / Video−14 LUFS, peaks ≤ −1 dB48 kHz 24-bit WAV
Light touchGentle cleanup and a −1 dB limiter, no loudness change48 kHz 24-bit WAV

Presets follow each platform’s published specs. Always check the platform’s current requirements before a big delivery. A passing check is a strong sign, not a guarantee of approval.

Deliver

From first take to ACX-ready.

  • ACX delivery package. Opening and closing credits, numbered chapter files, a retail sample, the cover, and a report with a pass or fail for every file. It even writes the credits for you to read.
  • M4B audiobooks with chapter marks and cover art that show up in Apple Books and most Android and desktop players.
  • One file per chapter, named the way ACX expects, with title, author, narrator and cover written into the files.
  • Captions as SRT or WebVTT, using your script’s own spelling and punctuation.
  • Narrate over video and export an MP4 with your mastered voice. The original sound dips under you automatically.

Export: WAV · MP3 · M4A · M4B · FLAC · OGG · AIFF · MP4 video · SRT · VTT

The ACX Delivery Package window listing the files it will build, things worth checking, and the opening and closing credits to read.

Read your next chapter with the script following along.

Free for 7 days, with every feature. No card needed to start.

Download Narration Studio ’27