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Old 1st November 2017
Here for the gear

An Intelligent Stereo Mic Technique Simulation App

Hello everyone,
As you know, when recording an acoustic ensemble on location (also in studios), it can be sometimes difficult to decide exactly where to place a microphone array and how to setup the distance and angle between microphones correctly for a desired stereo width and localisation characteristics. To support sound engineers and audio students, we at the Applied Psychoacoustics Lab (APL) of Huddersfield University, UK developed a free app called MARRS for an interactive stereo mic technique simulation. It has an object-based GUI which visualises perceived positions of sound sources for a given microphone array configuration. It is an interactive tool where you can select the number of sources and position them anywhere on a virtual stage (both azimuth and elevation) and set up a preset or customised mic array at certain distance and height. The perceived position for each source in reproduction is visualised interactively as you change the mic configuration. MARRS is also an intelligent tool that can automatically configure suitable mic spacing and angle for the user's desired stereo width. This is done in a way that you can choose a configuration anywhere between 100% coincident and 100% spaced. So MARRS is a useful app for preparing your recording session and also for a sound recording education.

You can download it free from either Apple or Google app store by searching MARRS. Below are the links to the app and a quick start guide and an AES paper that describes the psychoacoustic principle for the algorithm used in MARRS.

- Apple iOS:

- Google Android:

- Quick start guide:

- AES paper: AES E-Library » An Interactive and Intelligent Tool for Microphone Array Design

The current version is only for 2-channel stereo, but future updates will include a 3-channel version and a web-audio version with binaural and room simulation.

Hope you find these useful. Any feedbacks are appreciated.

p.s. Actually there are some minor bugs on the current iOS version (graphical issues) and we will address them soon, but all the main functions still work as intended. No known issue with the Android version so far.

Hyunkook Lee
Leader of the Applied Psychoacoustics Lab
University of Huddersfield

Last edited by hklworld; 2nd November 2017 at 04:28 PM.. Reason: additional info