EQBase

EQBase

Bold Biscuit
+
+

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About

EQBase is a native macOS app that puts an equalizer and a full set of audio controls in front of everything the Mac plays: browsers, calls, games, and system sounds, all at once. It ranges from a simple 3-control EQ to a 24-band parametric with dynamic and linear-phase filters, and includes correction curves for 8,666 measured headphone models, per-app volume and per-app EQ, per-app output routing, Audio Unit hosting, system audio recording, room measurement, and loudness compensation. It adds zero latency to the direct signal, and when every control is flat the output is bit-perfect, verified continuously against the live audio. Setup needs one system permission: no admin password and no kernel extension by default. The free tier has no time limit. Pro adds the advanced tools for $4.99/month, $39.99/year, or $79.99 once, with a 14-day refund. Requires macOS 14 or later, Apple silicon and Intel.

About

Audible's ACX has eight technical checkpoints, and a file that misses one comes straight back. chapterpass masters each chapter file to spec: RMS loudness between -23 and -18 dBFS, peaks held below -3 dBFS, a noise floor under -60 dBFS RMS, room tone at the head and tail, and a 192 kbps CBR MP3 on the way out. Every output is verified against the full spec before download, and you see the measured value next to the requirement for each checkpoint. The processing runs in your browser through WebAssembly, so your audio never leaves your device. There is no account to create. Your first file is free, then $36 per finished hour, $27 from 5 hours, $18 from 10 hours, billed by the second. A free measurement page at /free-acx-check reads your loudness, peak, noise floor and silence padding against the spec without mastering anything. chapterpass masters the measurable technical specs. It does not edit your recording, remove noise, or fix narration.

Platforms Supported

Windows Not Supported
Mac Supported
Linux Not Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Mac users on macOS 14 or later: everyday listeners, headphone owners, power users, audio professionals, and accessibility users who need per-ear correction.

Audience

Audiobook narrators, indie authors narrating their own books, audiobook producers and post-production studios preparing files for Audible ACX

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

No images available

Screenshots and Videos

No images available

Pricing

$4.99/month
Free Version Supported
Free Trial Not Supported

Pricing

$36 per finished hour
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Bold Biscuit
Founded: 2026
United Kingdom
eqbase.app/

Company Information

chapterpass
Founded: 2026
Italy
chapterpass.com

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Euphona

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Windwall

Windwall

RoVo
Loudness

Loudness

Loudness.fm

Categories

System Utilities Supported

Categories

Audio Mastering Supported

Integrations

No info available.

Integrations

No info available.
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