Audio RTA is a real-time octave RTA analyzer. It gives you a visual representation of an acoustic signal. It can be used to measure the frequency response of audio equipment or to analyze the sounds of musical instruments.


- Octave RTA analyzer: bands - full, 1/3, 1/6, 1/12 (RMS values)
- SPL Meter (dBFS)
- Fast real-time response
- Sampling rates: 44.1kHz, 48kHz, 96kHz*
- Fast Fourier Transform (FFT)
- Window sizes: 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536
- Max/min values
- Zoom and pan
- Measure values
- Audio input can be supplied via the built-in microphone and an external microphone (via the USB camera adapter or through the iPhone/iPad dock connector – Core Audio compliant devices)
- Sharing charts (through mail, social networks, clipboard)
- Exporting image charts (png) to the iOS 11 Document Browser (supports iCloud)
- SPL meter weighting: dBZ - linear

*For 96kHz analysis use an external microphone with such capabilities through a USB camera adapter or through the iPhone/iPad dock connector.

What's New

Version 2.6

- iOS 11, iPhone X ready
- Exporting image charts (png) to the iOS 11 Document Browser (supports iCloud)

Ratings and Reviews

3.9 out of 5
11 Ratings
11 Ratings

Great but, one thing...


I love this app, it has all the features that I was hoping for and more. However, I almost never need to zoom or pan and I always need to put my finger on the screen and pinpoint a frequency. With the zoom/pan/scroll function my finger has to be extremely still for half a second (which is too hard to do when you’r multitasking like when ringing out monitors) before I get those crosshairs and get to pinpoint a frequency. This is SUPER annoying. Please add a toggle to turn pan/zoom/scrolling OFF and make pinpointing instantaneous.

Absolutely the #1 choice for all mastering engineers!

Gera Kosmos

I bought 3 other apps before I found this one and wish I found this one first.. This app is solid and very accurate, I'm very happy!

Good replacement for old 32 bit RTA


I had to update my RTA from 32 to 64 bit. This works better than what I'd been using on my SE.


Pawel Krzywdzinski
10.5 MB
Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Pawel Krzywdzinski


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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