Octave RTA 4+

Real Time Sound Analyzer


    • $9.99



***** "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

What’s New

Version 1.2.5

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)

Ratings and Reviews

4.4 out of 5
148 Ratings

148 Ratings

Disgruntled PC Used ,

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.

TheDorg ,


Ok, Im a professional Videographer but I am not a sound man. sometimes I have to be one. I am absolutely giddy and blown away how a $4.99 app on my iphone 6S plus can quickly tell me what frequency an electrical transformer or fluorescent light fixture ballast room hum or an AC air vent noise is so i know what frequency to filter out in post to remove it from my video soundtrack. Not sure if there is a feature to save the pause of the screen like a screen capture to photos or possibly email it to myself so when i get back to the edit suite from location, i can reference the image to work with. That would be a very sweet addition to the next upgrade! This app is fantastic regardless of missing that enhancement..... 5 thumbs up!

aphaggar ,

Mastering Engineer

I must say I am more than disappointed with the latest update, as it does away with two of the things that made it unique: (1) the ability to monitor up to 1/12th of an octave (aka 12 musical semitones per octave. After all isn't this the namesake of the app!?) and on a related note (2) touching the graph no longer provides the quick frequency to pitch readout (aka musical letter name). I can't understand why you would use the update to remove essential features that made your product unique? I used this daily in my professional music mastering studio previously. Also, as a professor at a music technology university I used to recommend that all of my students purchase this app for ear training purposes. We are now experimenting with a replacement, while sorely missing the old Octave app we all used to rave about : (

App Privacy

The developer, ONYX Apps, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

Metronome Ϟ
LED Audio Spectrum Visualizer
Spectrum Analyzer RTA
FFT Plot
ClockMaster - Time Regulator

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