Room EQ Wizard

Room EQ Wizard is a Java application for measuring room responses and correcting modal resonances. It includes tools for generating test signals; measuring SPL; measuring frequency and impulse responses; generating spectral decay plots, waterfalls and energy-time curves; generating real time analyzer (RTA) plots; calculating reverberation times; displaying equaliser responses and automatically adjusting the settings of parametric equalisers to counter the effects of room modes.

Key Features

Free!
Support for the Behringer Feedback Destroyer Pro models DSP1124P and FBQ2496, including filter setup via Midi (Midi interface required). For a great resource on using the DSP1124P with a sub, check out the BFD Guide.
Support for the TMREQ equaliser in the TAG McLaren AV32R DP and AV192R AV processors, including filter setup via RS232
Signal Generator offers sine waves, square waves, linear and logarithmic sine sweeps, random pink noise (full range, speaker calibration, sub calibration and custom filtered) and periodic pink and white noise
Compensation for C-weighting when using an external SPL meter as the input, calibration files can be loaded for microphones or SPL meters
Existing measurement results can be imported from ETF 5, text files or WAV files
Frequency response measured using logarithmically swept sine signals for fast, accurate measurements with approx 0.36Hz resolution across the measured range or via real time analyzer with up to 1/48th octave resolution.
Impulse response is derived from the measurement, allowing spectral decay plots, waterfalls and energy-time curves to be generated. Impulse responses can be exported to and imported from WAV files with 16, 24 or 32-bit resolution.
Reverberation times derived in accordance with ISO 3382 in octave or one-third octave bands with results for Early Decay time (EDT), T20, T30 and an optimal fit RT60 figure.
Automatic identification of peaks in the response, automatic assignment of filters to peaks and optimisation of filter parameters to counter the peaks
Filter settings and sets of measured data can be saved to and restored from files. The filters' impulse response can be exported as a WAV file for use with a convolver plug-in, such as http://convolver.sourceforge.net/
Comprehensive help files within the application and on-line

Requirements

REW requires V5.0 or later of Sun's Java Runtime Environment, available from http://www.java.com or http://java.sun.com/j2se/downloads.html for Windows and Linux platforms. Update 10 or later is highly recommended
On Mac OS X platforms it may be necessary to download Java 2 SE V5.0 to get the V5.0 JRE. At the time of writing Release 6 was the latest available, but check http://www.apple.com/support/downloads/ for the latest J2SE release. Release 6 can be downloaded at www.apple.com/support/downloads/javaformacosx104release6.html. It may also be necessary to change the default Java application JRE version from 1.4.2 to 5.0
To change the default JRE version:
1. Open the Java Preferences application in /Applications/Utilities/Java/J2SE 5.0/
2. In the "Java Application Runtime Settings" panel, drag J2SE 5.0 to the top of the list (above J2SE 1.4.2)
3. Click Save
REW has been written and tested under Windows XP, most features should work correctly on other platforms that support Sun's Java Runtime Environment, except for RS232 serial communications (only used to communicate with TAG McLaren Audio AV32R DP and AV192R AV Procesors) which only function on Windows platforms. It has also been tested under Windows Vista and Mac OS X 10.4 & 10.5 (OS X 10.5 Leopard recommended).
Midi communication (used to set filters on Behringer BFD Pro DSP1124P and FBQ2496 equalisers) is supported on Windows platforms. Linux platforms will require Tritonus to support Midi comms. Mac OS X platforms with J2SE V5.0 installed should support Midi but don't, use Plumstone.
Minimum screen resolution: 800 x 600, 1024 x 768 or greater recommended
Minimum RAM: 256MB, 1GB or more recommended

Downloads

You must register and login to the Home Theater Shack forums to download the most current Room EQ Wizard files. Registration is fast, simple and free... and all downloads are free. The previous version can be downloaded directly via the links below without registering or logging in.

The current version is V4.11, released 10th March 2008. To view the revision history of Room EQ Wizard click here.

Room EQ Wizard for Windows current version
Room EQ Wizard application bundle (zipped) for Mac OS X
Room EQ Wizard jar files (zipped) for Linux platforms
Previous V4.00 version for Windows platforms
Jar files for previous V4.00 version for Linux or Mac OS X platforms
Previous V3.29 version for Windows platforms
Jar files for previous V3.29 version for Linux or Mac OS X platforms

Help Files

The Room EQ Wizard software contains comprehensive help information. You can also view the help files online or download them for offline viewing. For additional tips and assistance in using the software visit the Home Theater Shack forums.

Links

Appreciation

20th May 2005: The good folks over at the TAG McLaren Audio Owners' Forum got together and organised a superb plaque to show their appreciation of the Room EQ Wizard, and on top of that chipped in to fund the purchase of a measurement microphone and preamp to help me continue the development. Heartfelt thanks to everyone involved, especially to Graham who made a really fantastic job of the plaque.

Send feedback to John Mulcahy

The author has no affiliation with TAG McLaren, IAG or Behringer. All trademarks belong to their respective owners.