Welcome to REW

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

REW uses a logarithmically swept sine signal for its measurements. This is much faster than manual measurements, more accurate, less likely to suffer from clipping at resonances, less sensitive to system non-linearity than MLS and allows the impulse response of the room to be determined, which in turn is the basis for many additional features. When using the Real Time Analyser displays REW can generate Pink Periodic Noise sequences for much better visibility of low frequency behaviour than obtained using random Pink Noise without the need for lengthy averaging.

The REW home page is at www.roomeqwizard.com. For hints, tips and help visit the REW forum at www.avnirvana.com.

Requirements

REW can be used on Windows XP Pro x64/Vista/7/8/8.1/10/11, macOS 10.11 or later and Linux. 32-bit builds of Win XP are no longer supported.
Minimum screen resolution: 1024 x 768
Minimum RAM: 2 GB, 4 GB or more recommended
The Windows and Linux AMD64 installers include private Java runtimes for use by REW if a Java 8 runtime is not already installed. A separate Linux installer without runtime is provided for architectures other than AMD64, a Java 8 runtime must be installed to use that. Do not install a headless version of the Java runtime, they lack audio I/O
The macOS download includes a private Java runtime for use by REW. Java does not need to be installed. Microphone access permissions are part of the code signature and should be automatic. To force a mic access permission prompt for REW run
```
tccutil reset Microphone
```
from a terminal before starting REW
RS232 serial communications (only used to communicate with TAG McLaren Audio AV32R DP and AV192R AV Processors) only function on Windows 32-bit systems.
Midi communication (used to set filters on Behringer BFD Pro DSP1124P and FBQ2496 equalisers) is supported on Windows. macOS should also support Midi.

Windows XP Pro x64, Vista, 7, 8 or 8.1

When installing REW on Windows XP Pro x64, Vista, 7, 8 or 8.1 you may encounter a somewhat cryptic error message:
"The program can't start because api-ms-win-core-timezone-l1-1-0.dll is missing from your computer. Try reinstalling the program to fix this problem.".
This is caused by the Java runtime using components from the Windows Universal C Runtime which are not present on older Windows installations. To fix it see this Microsoft knowledge base article, KB2999226 at https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows.

Linux installation

Open a terminal window in the folder where the installation file was downloaded
After downloading the installation file set permissions to allow it to run and install it as follows (example is for 5.19):
```
chmod u+x REW_linux_5_19.sh
```
```
sudo ./REW_linux_5_19.sh
```
If your terminal working directory is not where the installer was downloaded include the path to the downloaded file. For example, if the terminal is open in your home directory and the installer was downloaded to the Downloads folder put Downloads/ in front of the installer filename.
Start REW by running
```
roomeqwizard
```

Diagnostics

REW saves diagnostic logs in the user's home directory in a folder called REW, the location is displayed in the Help → About REW window. The logs contain information from the last 10 startups, including any error messages or warnings that may have been generated. On macOS the logs are in an REW folder in the user library folder, which no longer appears in Finder by default. To display it either browse to ~/Library/Logs or open your Home folder in Finder (Shift Command + H), select View > Show View Options then select the checkbox to show the library folder.

REW saves a temporary copy of each measurement in a /temp sub-folder of the logs folder. Seven days of measurements are retained, any older than 7 days are deleted on shutdown. If REW did not shut down normally it will offer to load any measurements made since it last started up.

The startup preferences for REW on Windows systems are stored in this registry key:

HKEY_CURRENT_USER\Software\JavaSoft\Prefs\room eq wizard

On macOS the startup preferences are stored in:

~/Library/Preferences/com.apple.java.util.prefs.plist

under a key called room eq wizard.

Linux preferences are typically stored in:

~/.java/.userPrefs/room eq wizard/prefs.xml

Preferences can be deleted from Preferences → Delete Preferences and Shut Down or by running the REW uninstaller.

No Warranty

THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE

Acknowledgements

REW uses the JTransforms pure Java FFT library available at JTransforms

ASIO interfaces are supported using Martin Roth's JAsioHost, available at JAsioHost

WASAPI exclusive on Windows and ALSA PCM on Linux AMD64 are supported using Pavel Hofman's csjsound-provider, available at csjsound-provider

REW's installers are built with the Install4J multi-platform installer builder, available at ej-technologies

Thanks to Gerrit Grunwald for ideas and elements from his Steel Series components, available at Harmonic Code

REW uses the Hola Multicast DNS Service Discovery library available at Hola

REW uses the Java WebSocket client available at Java WebSocket

Get started with REW

Send feedback to feedback@roomeqwizard.com

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