# Octave RTA — Real Time Sound Analyzer

> Real-time audio analysis app for sound measurement and visualization. (iPhone/iPad app by ONYX Apps.)

- Source: https://appshunter.io/ios/app/octave-rta/id569156857 (this page in markdown: same URL + `.md`)
- Developer: [ONYX Apps](https://appshunter.io/developer/356553882)
- Category: Music, Utilities
- Price: $9.99
- Rating: 4.40/5 from 152 App Store ratings · 145 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 7 MB
- Released: 2012-10-20
- Data updated: 2026-09-02
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/octave-rta/id569156857/reviews.md

## What is Octave RTA?

***** "I use this app when sound checking, does the job, nice & simple to use, can't fault it." - Colin Challinor

Octave RTA is a powerful real-time audio analysis app. Designed with musicians and recording engineers in mind, it can also be used by anyone interested in the world of sound. Ideal for room tuning or speaker tuning, the app enables portable, precision audio measurement and visualization.

Feature Highlights:
● Full, 1/3 and 1/6 Octave
● FFT Size (2048 to 16384 points)
● Fast, Slow (exponential) and Infinite Averaging
● Toggle between Flat, A and C weighted modes
● Snapshot overlay for quick comparison
● Lock mode to auto track peak band
● Pan to adjust visible dB range
● iPhone X ready


Audio credits: "Basement Floor" and "Enchanted Journey" by Kevin MacLeod

## Key features

- Full, 1/3, and 1/6 Octave analysis
- Adjustable FFT Size
- Fast, Slow, and Infinite Averaging
- Flat, A, and C weighted modes
- Snapshot overlay for comparison
- Lock mode for peak band tracking

## What do users think of Octave RTA?

Overall sentiment: mixed

**Pros**

- 🚀 Accurate and precise measurements
- 👍 User-friendly interface
- 💡 Great tool for sound engineers
- 💰 Good value for money
- ✅ Works well for feedback detection
- 🌟 Professional-grade functionality
- 📱 Handy for on-the-go use
- 👍 Simple and effective
- ✅ Reliable and stable
- ✨ Visually pleasing design

**Cons**

- 🐛 Screen flashing/blinking issue
- 🐛 Gain adjustment not working
- 🐛 Microphone permission issues
- 🐛 Lack of advanced features
- 🐛 Inconsistent performance across devices
- 🐛 Vertical scale fixed at 6dB/division
- 🐛 No instructions or help section
- 🐛 Can't play pink noise from Apple Music

**Commonly reported bugs**

- Screen flashing/blinking on iPads
- Gain slider not working on some devices
- Microphone permission not appearing in settings
- App not working on iOS 14.2
- Display unstable and flashes wildly
- Screen flashing when iPad is flipped 180 degrees
- App flickering after updates

**Most requested features**

- Increase graph resolution (e.g., to 3dB)
- Alternative input sound sources (e.g., lightning audio)
- Standalone Mac app
- Alternative input sound sources (e.g., line in)
- Ability to switch to line input
- Save and manage frequency graphs as snapshots
- Add a simple sine wave tone generator
- Screen grab feature for graphs
- Ability to record or save data with descriptions
- Option to change display colors
- More advanced features
- Signal generator function
- 1/12th octave resolution
- Ability to work with a higher range of dB
- Zoom functionality for graphs
- 12th and 24th Oct smoothing
- Ability to choose between line and mic inputs on external sound cards
- Gain parameter control
- Normalization or sensitivity adjustment
- Higher resolution (e.g., 1/12 octave)
- Save and manage held frequency graphs
- Text description for screenshots

## Recent user reviews (10 of 145)

All indexed reviews: https://appshunter.io/ios/app/octave-rta/id569156857/reviews.md

### 5/5 — GOOD APP

*2026-03-05, version 1.2.5*

Amazing

### 4/5 — Aumentar resolução do gráfico

*2023-05-28*

É ideal ter a opção de aumentar a resolução para 3db no gráfico

### 4/5 — Please please please!

*2023-05-18*

Please add alternative input sound sources: audio via lightning for example. 
And please please please - do a standalone mac app!
Best analyzer on the market, compared with tons ov vsts - they are simply not so good

### 5/5 — Fantastic App!!

*2022-07-06, version 1.2.5*

One of my favourite apps of all time. I love it. I use it for work and playing around at home while listening to music. 
Thankyou for an excellent app!👍

### 4/5 — Microphone permission inhibited by screen time app

*2021-07-10, version 1.2.5*

Be advised that if you have Apple’s Screen Time app turned on it will not let you see this app in the microphone permission list.  iPhone 6 IOS 14.6.

### 3/5 — Обновления

*2020-12-06*

Не работает на iOS 14.2

**Developer response:** Hi, sorry for the inconvenience. This is a known issue with iOS 14.2. Simply delete and reinstall the app and it should work. With any issues, please contact us at apps@onyx3.com

### 4/5 — Finding feedback

*2020-02-08*

I use this app often and quickly to find feedback during sound check, when I’m working with a mainly analog system. Great little tool.

### 5/5 — El mejor RTA de la AppStore

*2019-11-08, version 1.2.5*

Me encanta la app, funciona al 100%
Es de mis principales herramientas de trabajo

### 5/5 — best rta app

*2019-11-08*

super usefull and simple!

### 3/5 — Mic gain adjustment

*2018-12-16, version 1.2.5*

I used to use this app all the time while doing live audio, but the updates have seem to disable the gain on the iPhone internal app. Total bummer.

## Frequently asked questions about Octave RTA

### What does Octave RTA do?

Octave RTA is a powerful real-time audio analysis application. It provides precision audio measurement and visualization, making it ideal for tasks like room tuning or speaker tuning. The app is designed for musicians and recording engineers but is also useful for anyone interested in understanding sound.

### What are the key features of Octave RTA?

Key features include full, 1/3, and 1/6 octave analysis, adjustable FFT sizes, various averaging modes (Fast, Slow, Infinite), toggleable weighting modes (Flat, A, C), snapshot overlays for comparison, and a lock mode to auto-track peak bands.

### Is Octave RTA free to use?

Yes, based on the provided information, Octave RTA is a free application. There are no mentions of in-app purchases or advertisements, suggesting it is entirely free to download and use.

### Who would benefit from using Octave RTA?

This app is primarily designed for musicians and recording engineers who need to analyze sound in real-time. It's also beneficial for audiophiles, home theater enthusiasts, or anyone involved in acoustic treatments, room tuning, or speaker calibration.

### What platforms is Octave RTA compatible with?

The application is designed for mobile devices, specifically mentioning 'iPhone X ready'. While the exact operating system isn't specified, it is available for iOS devices.

## Version history (last 5 releases)

### 1.2.5 — 2018-11-19

Thank you for helping us improve Octave RTA app! Please rate it on the App Store now, so we can make it even better!

● Toggle between Flat, A and C weighted modes
● Snapshot overlay for quick comparison (RTA module)

### 1.2.3 — 2018-10-31

Thank you for helping us improve Octave RTA app! Please rate it on the App Store now, so we can make it even better!

● Support for the latest iOS and devices
● Fixed microphone permission issue with iOS 12

### 1.2.1 — 2015-08-18

Thank you for helping us improve Octave RTA app! Please rate it on the App Store now, so we can make it even better! 

● 64-bit
● Minor fixes

### 1.1 — 2014-12-20

Thank you for helping us improve Octave RTA app! Please rate it on the App Store now, so we can make it even better! 

● Native iPhone 6 graphics
● Does not mute other audio
● Audio Interface Settings
● Stability improvements

### 1.0 — 2012-10-20

No release notes.

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| --- | --- | --- | --- |
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## More apps by ONYX Apps

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All apps by ONYX Apps: https://appshunter.io/developer/356553882

## Related topics

[octave rta](https://appshunter.io/ios/topics/octave-rta)

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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 2026-09-02.*