# Surround Generator Dolby 9.1.6 — Surround Audio Test Signals

> Surround Audio Test Signals (iPhone/iPad app by Andrew Smith.)

- Source: https://appshunter.io/ios/app/surround-generator-dolby-916/id1254544184 (this page in markdown: same URL + `.md`)
- Developer: [Andrew Smith](https://appshunter.io/developer/291822462)
- Category: Utilities, Music
- Price: $29.99 with in-app purchases
- Age rating: 4+
- Requires: iOS 16.6 · 2.0 GB
- Languages: English
- Released: 2017-10-24
- Data updated: 2026-08-11
- User reviews in markdown: https://appshunter.io/ios/app/surround-generator-dolby-916/id1254544184/reviews.md

## What is Surround Generator Dolby 9.1.6?

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 9.1.6 (optional) test signals available in several types. It also includes a variable sine sweep generator.

Use these signals to test, calibrate, and adjust your sound system for the best audio experience possible. You will 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, but may also be used with other test & measurement platforms. 

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
● LARSA Delay Test signals for subwoofer time-alignment
● Sine wave generator in Stereo mode, 10Hz-2000Hz sweepable

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.

## Pricing and in-app purchases

Base price: $29.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Atmos Surround Signals | $59.99 | one-time |



## Version history (last 5 releases)

### 3.7 — 2026-08-08

-Bug fixes and stability improvements 
-Improved communication stability
-Fixes remote test signals playing incorrectly in some cases

### 3.6 — 2025-05-07

-Improved WAV file import
-Increased Sine wav output level to -12dBFS

### 3.5 — 2025-04-28

-Bug fixes and stability improvements

### 3.4 — 2025-04-25

-Added WAV file import and playback to Stereo screen
-Added generator playback to Stereo Screen
-Fixed LARSA sweep files in 5.1 and 7.1
-GUI improvements

### 3.3 — 2025-04-17

-Added feature to import WAV files from AudioTools running on an iOS device
-Implemented sine wave generator on 2.0 Stereo page
-Bug fixes

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## More apps by Andrew Smith

- [Speaker Polarity](https://appshunter.io/ios/app/speaker-polarity/id293263027)
- [SPL](https://appshunter.io/ios/app/spl/id293573990)
- [RTA](https://appshunter.io/ios/app/rta/id298839433)
- [FFT](https://appshunter.io/ios/app/fft/id298840058)
- [RT60](https://appshunter.io/ios/app/rt60/id298840320)
- [Generator](https://appshunter.io/ios/app/generator/id298840802)

All apps by Andrew Smith: https://appshunter.io/developer/291822462

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-11.*