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.
sudo apt-get install openjdk-8-jre
chmod 777 REW_linux_5_19.sh
REW saves diagnostic logs in the user's home directory, 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 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 made in the logs folder. A normal shutdown deletes those temporary copies. If REW did not shut down normally it will warn of temporary file existence on startup and offer to load them.
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.plistunder a key called room eq wizard.
Preferences can be deleted from Preferences → Delete Preferences and Shut Down or by running the REW uninstaller.
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