Back to home
Products & Tools

Audiobook mastering tools. Built for indie creators.

Mic Test is live today, free, in your browser, listening to your room and your voice for five seconds and telling you what to fix. Studio ships next: chapter QC, enhancement, mastering, and a producer's note per chapter to get your files retail-ready.

Mic Test

Live · Free

Five seconds, free, in your browser. We listen to your room and your voice and tell you what to fix: the loudest peaks, your speaking level, room noise between words, any distortion. Every check carries the platform rule and the next concrete action, never just a number.

Open tool
What it does
  • Loudest peaks in the safe range (≤ −3 dBFS)
  • Average voice level inside the ACX target window (−23 to −18 dBFS)
  • Room quiet enough between words (noise floor ≤ −60 dBFS)
  • Distortion (clipping) caught before submission
  • Verdict, rule, and next action on every check

Studio

Next up

Upload a chapter, get a retail-ready master. Per-chapter QC for ACX, Apple Books, and Spotify Audiobooks. A producer's note per chapter, one paragraph in plain English with one to three concrete next actions, benchmarked against professionally produced audiobooks in your genre. Speech enhancement, bandwidth restoration, and 192 kbps CBR MP3 mastering at 44.1 kHz.

Notify me when live
What it does
  • Per-chapter QC for ACX, Apple Books, and Spotify Audiobooks
  • Producer's note: plain-English verdict + concrete next actions
  • Speech enhancement and bandwidth restoration
  • Retail mastering: 192 kbps CBR MP3 at 44.1 kHz
  • 1–5 second room-tone head and tail, enforced on export
  • Genre-aware benchmark against professionally produced audiobooks

Tell us what to ship next.

Studio is up next. Join the early access list and tell us what you're producing. Your use case shapes what we build first.

Request early access