Studio Six Digital

Studio Six Digital creates advanced audio test and measurement systems based on the iOS platform. 

iOS 11 and new iPhones

iOS 11 works fine, although there are still a few graphics issues we are working on. iPhone 8 is exactly like iPhone 7, to AudioTools. 

We will be updating the calibration database (see below) for iPhone X, as soon as we can get our hands on one.

UPDATE: We have a beta version of AudioTools that works on iPhone X, if you would like to try it, just email us and we will send you a copy. 

Due to Apple rounding the screen, removing the home button and replacing it with a line on the bottom of the screen, and adding the "notch" to the top of the display, we no longer have a simple rectangular canvas with which to work. Also, the iPhone X handles landscape mode differently, and does not support Portrait upside-down mode at all.

There is no system-wide change or app setting that we can apply that adapts all of the AudioTools screens (more than 150!) to the new display. The conversion requires us to manually update each screen to the relatively new auto-layout mode, and for that we need to also drop support for iOS 8. 

We are making great progress with this process, however, it will be a few more weeks until we have a stable AudioTools release that will work on iPhone X. We will send out an email when we have that release ready, so make sure that you are on our mailing list.

New Calibration Database

We have implemented a cloud-based database with individual calibration values for every iOS model, in all supported iOS versions. Now we can update calibration for new devices in real time, without requiring an app update. You may see messages about new calibrations being installed from time to time. Please let us know if you are experiencing any calibration issues, by using our Calibration Error Report.

New User Guide

Download our new AudioTools User Guide here.

New! "All-in Option"

Get every module (except STIPA Pro) and save money! Future-proof since it includes most new modules as they are released.

New! iTestMic2 

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iTestMic2 improves on the popular iTestMic by adding a 3.5mm stereo analog output jack and iOS device charging. The perfect solution for iPhone 7. Now with individual frequency calibration files.

Now shipping.

New! Weatherproof Multi-Purpose Case


Our new heavy-duty, waterproof Multi-Purpose Cases are in, and ready to ship. They have high-density foam that is laser-cut to fit our microphones, and iPhones (models 5, 6, and 7, but not Plus) as well as an iPad mini.

Great way to transport and present the AudioTools system.

Now shipping.

iOS 10 and iPhone 7 Updates

iAudioInterface2 Lightning/USB now shipping.



iAudioInterface2 and included iOS Lightning and USB Audio interconnect cables.

The professional audio interface for iOS devices made to work with for AudioTools.

Phantom powered mic input, balanced line input and output, digital audio output, internal battery, and iOS device charging.


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AudioTools is the professional audio test & measurement app that gives you a comprehensive set of tools on your iOS mobile device. Perfect for A/V techs, FOH, recording engineers, acousticians, home theater installers, and anyone who loves pro audio. 

Upgrade AudioTools with iAudioInterface2, or iTestMic, to complete your mobile professional audio test & measurement system.

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iTestMic is the most affordable way to have a calibrated SPL Meter, RTA, FFT analyzer and more.  Plug it into your iPhone, iPod touch, or iPad to get a mobile professional test & measurement system. $229.

Includes an analog output and iOS device charging. Use it for home theater setup, live sound, SPL testing, or sound contracting work. 


Order iTestMic2 here. 


iPrecisionMic is the newest addition to the Studio Six Digital family of acoustic test & measurement products. Plug it into your iOS device running AudioTools and instantly you can have a Type 1 certified sound level meter and analyzer.


Perfect for noise monitoring and surveys, critical acoustical analysis work, and any time that a high-quality precision professional microphone is required. Available both with and without a Type 1 Calibration Certificate, starting at $1099.


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