Antares Auto-Key 2

The deal

$25 at PluginFox (down from $50). Sale ends June 30, 2026.

What it is

Antares Auto-Key 2 is a key and scale detection plugin that analyzes your audio in real time and automatically identifies the musical key and scale of a track. It integrates directly with Auto-Tune - clicking "Send to Auto-Tune" instantly updates every Auto-Tune instance in your session to the correct key. Built on the TONART V3 engine by zplane, it also works on standalone audio files outside your DAW session.

Who it's for

Producers and engineers who use Auto-Tune on vocal tracks and want to eliminate the manual work of setting key and scale on every instance. Also useful for DJs who need to quickly identify the key of tracks for harmonic mixing.

Key features

• Real-time key and scale detection using zplane's TONART V3 engine
• One-click sync sends the detected key directly to all Auto-Tune plugins in your session simultaneously
• Supports standalone analysis of MP3, WAV, FLAC, and AIFF audio files outside your DAW session
• Pitch reference display with Detune control for adjusting non-standard A440 tuning