Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To buy and download Octave RTA - Real Time Sound Frequency Analyzer by ONYX Apps, get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Octave RTA - Real Time Sound Frequency Analyzer

By ONYX Apps

Open iTunes to buy and download apps.


***** "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
● Classic and Modern display modes
● Draggable Cursors
● Lock mode to auto track peak band
● Pan to adjust visible dB range
● Retina display and iPhone 6 ready

Octave RTA is also available within our Spectrum Analyzer suite, which also includes FFT, Spectrograph and Tone Generator modules. If you need more than just RTA please search for "Spectrum Analyzer" app.

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

What's New in Version 1.2.1

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


iPhone Screenshot 1
iPhone Screenshot 2
iPad Screenshot 1
iPad Screenshot 2

Customer Reviews

Great feedback fighter

I use it on my iPhone 6 to quickly pick out resonant notes in my PA system when setting up for a gig, and this app works great for that. The mics on the iPhones and iPads are not calibrated reference microphones, so the app is not accurate for ringing out a room for a perfectly flat response, but for this price I'm very happy.

Works great on my iPhone 6, but the screen flickers constantly on my third gen iPad since the latest update. The app is still useable though; the flicker is merely annoying.

It does the job!

I love this app! It definitely does the job! It is practical without being complicated. Reminds me of the old hand held analyzers we had years ago, but it's much better! I like that I can switch from octave to 1/3 to 1/6, also that I can switch from bars to line graph, change the speed, and choose the type of peak indicator I want. And pause it while I make adjustments to my equipment!

Solid RTA

I'm a audio tech who does not have perfect pitch so I use this app all the time (especially when ringing out mics). It's solid. I've tested it with a frequency generator and it's accurate within about 25Hz; which is certainly close enough for me!

Octave RTA - Real Time Sound Frequency Analyzer
View in iTunes
This app is designed for both iPhone and iPad
  • $4.99
  • Category: Music
  • Updated:
  • Version: 1.2.1
  • Size: 15.3 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: