What's New

-Added ATMOS and 5.1 test signals for the new LARSA Delay test in AudioTools

App Description

Surround Generator is an audio signal generator for Apple TV that can send test signals to specific speaker channels. The app has Dolby Digital 5.1, 7.1, and Atmos (optional) test signals available in several types.

Use these signals to test, calibrate, and adjust your sound system for the best audio experience possible. To use these, you need a system for analyzing the test signals both in frequency and level. They are designed specifically for the iOS app AudioTools, which has a number of test and measurement modules available.

Formats include 5.1 surround, 7.1 surround, and optionally Atmos 9.1.6 test signals. Apple TV 4k is required for Atmos signal support.

Note: This app does not include any testing capabilities, other than being able to make sure that your speakers are assigned to the correct channels, left, right, center, surround, and height.

The test signals in Surround Generator include:

● Full-Band Pink Noise for Frequency Response Tests
● Mid-Band Pink Noise for Level Tests
● Impulse for Time Delay and Room Acoustics Tests
● Speaker Polarity Test Signal
● 7-second Impulse Response Sweep Signal
● 0.5s LARSA Chirp Signal

Note that you have to have surround sound and Atmos set up in your Apple TV and audio processor or receiver to be able to use this app.

Apple TV Screenshots

(click to enlarge)

Surround Generator screenshot 1 Surround Generator screenshot 2 Surround Generator screenshot 3 Surround Generator screenshot 4

App Changes

  • October 25, 2017 Initial release
  • June 13, 2019 New version 1.1
  • July 14, 2020 New version 2.1
  • July 14, 2020 Price decrease: $24.99 -> $14.99
  • October 22, 2020 New version 2.3
  • October 22, 2020 Price increase: $14.99 -> $24.99
  • September 29, 2021 New version 2.5
  • September 16, 2023 New version 2.8
  • November 03, 2023 New version 2.9
  • April 25, 2024 New version 3.0
  • April 25, 2024 Price increase: $24.99 -> $29.99