← Arntz Labs

CP–TU–01 · Freeware · Version 0.2.0

Copper Series Tuner

A fast, accurate chromatic tuner for live instruments. The massive color LCD makes the note and cents offset unmistakable at a glance, with reference A always close at hand.

Download Copper Series TunerMacWindowsFree · No account · No activation

Use it by itself on Mac or Windows, in Logic, REAPER, Ableton Live, and other AU/VST3 hosts, or as AAX Native in Pro Tools on Mac.

Copper Series Tuner actual application interface
01

Massive LCD scale

The nearly full-width tuning display is green at the center and moves through traditional warning colors to red at the edges.

02

Adjustable reference

Set concert A anywhere from 430 to 450 Hz for modern, historical, or ensemble-specific tuning.

03

Immediate pitch reading

The current note and precise cents offset stay clear from across the room without visual clutter or wasted panel space.

04

Private and offline

No account, telemetry, advertising, upload, or online activation. Your audio never leaves your computer.

Release details

Signed. Verified. Ready.

Version 0.2.0 introduces the massive color LCD tuning scale, compact note and reference controls in the header, and a tighter 760-by-312 interface while preserving the tuning and saved-state contract. The free universal macOS Standalone, AU, VST3, and AAX Native releases are Developer ID signed, Apple notarized, stapled, and exact-package verified. The AU passed Apple's auval, the VST3 passed all 47 official Steinberg validator tests on Apple silicon and Intel, and the PACE-signed AAX passed all 13 required Avid Validator records plus retail Pro Tools 2026.4.1 live-input and full-reopen state qualification. The Windows x64 Standalone and VST3 binaries are Authenticode signed and timestamped, passed release tests and all 47 official Steinberg validator tests before and after signing, passed exact clean-extraction and Microsoft Defender checks, and passed full-reopen state qualification in Standalone and REAPER. AudioSuite is intentionally unsupported because tuning requires live input.

Version
0.2.0
Published
Redesigned production release · August 26, 2026
Mac Standalone SHA-256
9ca10b4eb02671d9f4e932dcb19bf42087917e4100c3f93ced3623bc5c04adf9
Mac AU/VST3 SHA-256
da7a5739ab366ab0c7acc760b6ebcb1f52fe6c801ce27055abd989cf08351bcd
Mac AAX Native SHA-256
e8e2b60159791a119d78fb88622e08f99e2c90359c7d905b07c03fede4c21ec6
Windows Standalone SHA-256
b54f01b2363288e7e4b51964e22efff4c87301a93cd347453bfcc67914386d3b
Windows VST3 SHA-256
5213b4aec7369e39e529e2895df0b8945ee9b62812efd4605ea82f56156113f5
Legal
Privacy · Freeware license · Third-party notices
Support
support@arntzlabs.com