Play Auto-Key | Music key detection on PC and Mac

About the Game

Auto-Key | Music key detection is a specialized audio utility created by Antares Audio Technologies, the team behind one of the most recognized names in pitch correction technology, Auto-Tune. The app brings professional-grade key detection capabilities to mobile users, giving musicians, producers, and performers a reliable way to identify the musical key of any piece of audio quickly and accurately.
The detection process is designed to be as simple as possible. Rather than requiring complex configuration or manual input, the app works by listening to a short audio sample, typically just a few seconds in length, and then returning the most probable musical key. Alongside the primary key result, Auto-Key also provides the diatonic key, giving users a more complete harmonic picture that is useful for arranging, composing, and performance preparation.
What sets Auto-Key apart from generic pitch tools is its ability to work across a wide variety of audio sources. It does not require a direct connection or a specific input method. Users can point their device toward:
Audio playing through a speaker or monitor
Live acoustic instruments being performed in real time
Vocal performances or melodic phrases
Any ambient audio that carries a discernible musical key
This flexibility makes the app genuinely useful in a range of real-world scenarios. Whether you are in a rehearsal space trying to match keys with other musicians, in a studio quickly checking the tonality of a reference track, or out in the field capturing ideas, Auto-Key adapts to the situation without requiring additional hardware.
One of the most practical features for studio professionals is the ability to share and sync the detected key directly with an Auto-Tune session running inside a DAW on a desktop computer. This means the mobile detection result can flow directly into the production environment, removing the need to manually determine or input key settings during a session. For anyone already using Antares products in their workflow, this integration feels like a natural extension of the tools they already rely on.
The app interface is built around simplicity. Activating key detection is done by tapping the Auto-Key logo on the home screen, making the process feel immediate and accessible even in fast-paced studio or performance settings.
For users who prefer working on a larger screen or who want to incorporate key detection into a desktop-based production workflow, running Auto-Key through MuMuPlayer on PC is a practical solution. MuMuPlayer allows the app to run in a stable PC environment, which means you can have the key detection tool visible alongside your DAW without needing to switch between a phone and a computer. The enhanced display size makes reading results faster, and the consistent performance of a desktop system supports reliable audio capture during critical sessions.
Auto-Key | Music key detection brings together the legacy of Antares Audio Technologies and the convenience of mobile technology to deliver a tool that is both accessible and genuinely useful for modern music production, from the recording booth to the stage and everywhere in between.