Everything you need to trust your sound
Practical diagnostics and interactive tests in one focused app.
Connection & Diagnostics
See whether your Apple TV is delivering Dolby Atmos, with an honest read-out of your route, channels, sample rate, and supported formats.
Test Tones
Calibrated pink-noise tones for every channel, from stereo up to 9.1.6 — isolate a single speaker or play a stereo pair, with proper LFE leveling.
Spatial Test
Move sound objects around you in 3D space to confirm your system places effects exactly where they belong.
Calibration
A guided, by-ear walkthrough for level matching, distance/delay, speaker polarity, and subwoofer crossover — no special hardware required.
Demos
Browse and play publicly available Dolby Atmos demo clips to show off what your system can do.
Private by design
No accounts, no analytics, no tracking. Everything runs locally on your device.