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The CROSTALK app

Your control panel. Free, always.

CROSTALK is your control panel for the CROSTALK personal audio processor. Set your own balance, shape the mix, and tune exactly how you hear (music, voices, and the room around you) from a clean, elegant panel on your phone.

Download on the App Store

Free. No account, no subscription. The app is also how your device gets firmware updates.

CROSTALK app Mixer screen: mic, left, right, and media faders, with the Mirror control below

Mixer and Mirror

Four faders: mic in, left out, right out, media in, each with its own mute. Below them, Mirror, the control that brings the far channel across to the ear you favor, on a dial you set. You decide where the sound sits. Everything else on this page is built around that mixer.

Faves

Six profiles: Speech, Music, and four of your own. Each one holds your mixer, EQ, and DSP settings. Tap to load, save over it when you find something better, long-press to rename.

Channel EQ

Three bands per output channel: bass, mid, treble. Shape left and right separately, push one curve across to match the other, or reset to flat.

DSP effects

Three effects, each with its own amount. Compression narrows the gap between quiet and loud. De-noise trims steady background noise. Loudness fills in bass and treble when you listen quietly.