No longer used:  REW Windows 32-bit installer (requires 32-bit Java 8)

No longer used: REW Windows 32-bit installer (requires 32-bit Java 8) V5.20 beta 7

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The Windows 32-bit installer is now here.

V5.20 beta 7 changes detailed here.

V5.20 beta 6
  • Added CTA-2034-A shaped noise signals to the signal generator
  • Added a control to select either CEA-2010 or CTA-2034-A max SPL limits on the RTA
  • Removed the spkr cal and sub cal options for white periodic noise, only applicable for pink
  • Expanded graph capture aspect ratio options to include 10, 25 and 50 dB/decade
  • Put font size control for graph capture into the graph capture dialog, added separate font size control for the comment
  • Added comment position and comment alignment controls to the graph capture dialog
  • Signal generator settings for WAV repetitions and WAV duration are remembered for next startup
  • Added the first order low and high pass filters to the miniDSP equalisers
  • Set default for allow log spacing back to False
  • Added an option to show the measurement notes in a tooltip when the cursor is over the measurement name in an overlay graph
  • Exported filter impulse responses now start at sample zero rather than sample 2
  • Imported impulse responses are padded with additional zero samples before and after the response if the peak is near the start of the response
  • Added ability to drag and drop audio files onto the RTA for processing
  • Bug fix: Changing equaliser type could generate an exception
  • Bug fix: Loading a measurement could fail for some equaliser settings
  • Bug fix: Fractional octave smoothing of log spaced data could produce incorrect values at the start of the plot
  • Bug fix: Cal file phase corrections should not be applied to the min phase response
  • Bug fix: graph image capture width was not saved for next startup when copying to clipboard
  • Bug fix: Graph legend layout was not updated properly for the chosen graph capture font
  • Bug fix: Overlay SPL graph showed an Ohms axis on the RHS when it was not required
  • Bug fix: IR peak interpolation could miss the interpolated peak and use the sample peak in some circumstances

V5.20 beta 5 changes:
  • Revised the EQ target setting panel to better explain the target types and separate the room curve controls, which can be separately enabled/disabled
  • Added a check box to enable/disable room curve settings
  • Added a "Speaker driver" target type with configurable low and high pass crossover filter responses
  • Added LP1 and HP1 filter types to the Generic equaliser to provide first order (6 dB/octave) LP and HP
  • Expanded the equaliser selection help to add a table of Q values to use with LPQ/HPQ filters to implement crossovers up to 8th order
  • Allow up to 8 subwoofers in the room simulator
  • Added a multitone decade fraction spacing option
  • Added a 1/48 octave option for multitone octave fraction spacing
  • Graph capture can now either save the image to file or copy it to the clipboard
  • Added a "Preview comment" button to the graph capture dialog
  • Step response calculation uses the windowed IR (including FDW if applied)
  • Main window comes to the front if a menu item is selected
  • Waterfall frequency resolution figure (to right of window width control) now takes into account the rise time
  • Window width, rise time and frequency resolution of the waterfall now appear in the top right corner of the plot
  • Do not show the distortion low pass/high pass overlay shading on the RTA when using dual tone or multitone test signals as they do not apply
  • Added a workaround for a Windows Java bug preventing proper display of Chinese characters in Audio device names, should also help with other non-latin character sets
  • If a recognised USB mic is selected as the input device automatically select the input as well so that the volume control is accessible
  • Removed -100 dB lower limit for magnitude values in imported responses
  • Reference input selector is shown on the Measure dialog when measuring impedance
  • Secondary output selector is not shown on the Measure dialog when measuring impedance when using ASIO
  • Use 4 decimal places on Distortion graph for distortion values below 0.01 %
  • Added support for importing COMSOL impulse response text files
  • Set default for the "Allow 96 PPO log spacing" analysis preference to be selected for new installations to reduce memory use and file size
  • Further reductions in memory use
  • Changed the installer application name from Room EQ Wizard to REW, affects the program group name and the shortcut name
  • Bug fix: Check levels could fail on the Measure dialog for some sweep frequency spans
  • Bug fix: Results of trace arithmetic on imported audio data would not generate waterfalls or spectrograms
  • Bug fix: Prevent multiple prompts for "Assuming a UMIK" when using ASIO4All and a UMIK is connected but it doesn't appear in the list of ASIO4All inputs
  • Bug fix: Maximum end frequency for sweep was not initialised correctly when Measure dialog was first shown
  • Bug fix: Spectrogram plot start frequency took account of lowest valid frequency for windowed IR instead of depending only on spectrogram window
  • Bug fix: Previous sample rate was not restored on the next startup

V5.20 beta 4:
  • When measurements with distortion data are averaged using (A+B)/2 or Vector average their distortion data is also averaged, providing the measurements were made at the same sample rate and with the same sweep or stepped sine settings
  • Added a Window function setting for the tone burst generator with a range of window types
  • Reduced memory use and file size for sweep measurements
  • Added Float as a format for exported WAV files
  • Additional text for graph captures is now placed above the graph and can be styled using HTML
  • Added a View preference to show user-defined watermark text on all graphs and graph captures apart from waterfalls and spectrograms
  • Replaced the Tukey 10 ms window by a Tukey 0.01 (1%) window
  • Added a soundcard preference to choose random or periodic pink noise for level checks
  • Bug fix: Saving signals to WAV did not work for signals which used the duration control
  • Bug fix: Saving a signal with repetitions to WAV could fail if the output file was very large
  • Bug fix: Sweep level control was not listening for changes to the "Full scale sine is 0 dBFS" preference
  • Bug fix: Dither could be added to the multitone test signal even if the Add dither box was not selected
  • Bug fix: An exception could occur when using the EQ window with a measurement that did not have an impulse response
  • Bug fix: Ensure graph title fits within the graph width if capturing a graph image including the title
  • Bug fix: Level checks using pink PN were selecting the full range signal instead of the sub or spkr cal signal
  • Bug fix: Installer JRE download links were incorrect

V5.20 beta 3

  • Restored 16k and 32k sample rate options for sig gen WAV files and filter impulse response exports
  • Update the sample rate selector when reloading the ASIO driver
  • Added an option to plot distortion harmonics at the harmonic frequency rather than the fundamental frequency
  • Update dBFS scaling for signal generator and RTA when focus leaves the dBFS scale field
  • Restart any ASIO audio I/O after changing input or output channels
  • If a graph capture includes the legend it will use the graph capture font configured in the View preferences and the legend will only include traces that are on the graph
  • When exporting filter settings as text use 2dp for frequencies below 100 Hz and 2dp for gain
  • Improved rendering of waterfall time slice labels on macOS
  • Changed Stepped sine button shortcut to Alt+N
  • Use rectangular window for stepped sine measurement (test tones are aligned to FFT bins)
  • After starting the RTA or changing the FFT length averaging does not begin until a full FFT length of data has been received, plus the lengths of the input and output buffers
  • If the selected measurement is outside the area of the SPL & Phase graph shift the graph to make the measurement visible
  • Disabled control of input or output volume from Soundcard preferences on macOS, macOS only permits values corresponding to specific dB increments which vary according to the device and its volume range. Use Audio MIDI Setup to control volume settings.
  • File preview only shows the first measurement for very large MDAT files (>100M)
  • Added option in the 64-bit Windows installer to choose how much memory to allocate to REW when it runs
  • Added option at end of installer to launch REW
  • Added options in the uninstaller to delete REW preferences and the REW log files directory
  • Changed the macOS installer to install to a directory so that the uninstaller can be included and the roomeqwizard.vmoptions file is more easily accessed
  • Bug fix: Calibrate soundcard wouldn't work on macOS
  • Bug fix: If the sig gen had not been launched calibrate soundcard would fail to play the 1kHz tone and check levels would not work
  • Bug fix: Output level was not shown on VU meter when measuring with a 4M sweep
  • Bug fix: THD percentage or dBr figures in the graph legend did not use the harmonic frequency as the reference when that option was selected but the plot was not normalised
  • Bug fix: The reference measurement trace on the RTA window was plotted using the system SPL offset rather than the offset from the selected measurement
  • Bug fix: Stepped sine fundamental and harmonics could be drawn at the wrong position when the RTA axis was volts or watts
  • Bug fix: REW V3 measurements could not be loaded

V5.20 beta 2:

  • Gave the signal generator a revamp and added a signal waveform preview
  • Added fade in and fade out controls to the linear and log sweep signals
  • Added AES17-2015 MD and DFD presets to the dual tone signals
  • Changed sig gen level control behaviour for dual tone signals, the level setting now reflects the rms level of the combined signal rather than the rms level of f1
  • Added a selection of multitone test signals
  • Allow RTA lengths up to 1M
  • If the RTA update interval is more than 1 second show the percentage progress for the next update on the record button
  • Provide separate buttons in RTA to save current, peak and both traces
  • Added dBu and dBV RTA Y axis options and a level calibration capability
  • Added dBW RTA Y axis option and a control for the reference resistance for the dBW values
  • Added an option to show RTA distortion ratios as either percentages or dB
  • Expanded the RTA IMD results to include Total Distortion + Noise
  • Added RTA figures for Total Distortion + Noise and SNR when using the multitone test signals
  • Added two Dolph-Chebyshev RTA window options, with side lobes 150 dB down or 200 dB down
  • Added an A weighted dynamic range figure to the RTA THD results
  • Added a display of the peak sample value in the RTA rms input levels box
  • Determine a more accurate value for the IR peak when it lies between samples
  • Improved precision of Estimate IR Delay
  • Made the acoustic timing reference delay estimates more precise
  • Improved inter-sample rendering of impulse responses so the waveform retains the same shape regardless of fractional sample offsets,
    to achieve this the IR is oversampled using a method selected by the new IR oversampler option in the Analysis preferences.
  • Changed behaviour while capturing the noise floor before a sweep measurement. Used to play a 1 Hz sine at -150 dBFS, then stop the generator and start it again to play the measurement sweep. Now dithers the lsb before the sweep starts without having to stop and start the generator. Should help ensure digital inputs are active and locked to the generator before the sweep starts and prevent issues with audio drivers due to rapid stopping/restarting of the audio lines.
  • Decay, waterfall and spectrogram plots generate automatically when the graph is selected
  • Added a button in the Impulse graph controls to set t=0 at the cursor position (also activated by Alt+z when the control is visible)
  • Added a button in the Impulse graph controls to set t=0 at the IR start (also activated by Alt+y when the control is visible)
  • Added a button in the All SPL graph controls to set t=0 at the IR start for all the currently selected measurements
  • Added an option to normalise the step response to the IR peak value rather than the step response peak value
  • Changed the Merge operation to use the window settings of the B (low frequency) trace rather than the A trace
  • Show more decimal places on the window reference time as it gets closer to zero
  • Added an option to export the impulse response with EQ filters applied
  • Changed the Analysis options for setting t=0 to use either the IR peak, the start of the IR (based on it first exceeding 10% of the peak level) or the estimated IR delay
  • Added 2M and 4M sweep options, useful for improving signal to noise on high sample rate measurements
  • When importing impulse responses disabled the feature that rotated the peak to the middle of the data if it was found very close to the start of the data
  • Added all-zeroes check for imported audio files
  • Switched level checks to using Pink PN instead of random pink noise for faster and more accurate level readings
  • Persist the choice of sub or main speaker for levels check in SCSettings
  • Improved rendering of scope traces
  • Made the legend panel right click menu available in all graphs, not just overlays
  • Show a warning if the timing reference peak level is high
  • Increased span of level meters in soundcard preferences to 100 dB
  • Added a note in the View preferences to identify settings that are applied after restart
  • Removed heading text from TS parameters results panel to reduce height of window
  • Added a View preference for the font size used for graph axes in graph image captures
  • Reapply ASIO sample rate after reloading the ASIO driver
  • REW now requires a Java 8 JRE, Java 7 is no longer supported
  • Bug fix: FDW phase correction for win ref time offset from zero was inverted
  • Bug fix: Generating a min phase measurement did not take account of any frequency dependent window applied
  • Bug fix: Mouse wheel zoom did not maintain aspect ratio when zooming out
  • Bug fix: Input name disappeared from RTA window title when settings were changed

V5.20 beta 1:
  • Increased audio data timeouts for macOS to accommodate 10.14 Mojave delays in granting audio access
  • Changed text for checkbox to lock sine gen frequency to RTA FFT length and included the FFT length in the text
  • Added Preferences menu entries to set the REW main window to a selection of predefined sizes
  • Bug fix: If not setting t=0 at IR peak the win ref time was not being reset after estimate IR delay, causing incorrect phase for FDW
  • Bug fix: SPL meter value would stop updating after a measurement if the Levels meter was open

Small changes in 5.19 beta 12, all being well the last before the 5.19 release.

  • Improved rendering of text on spectrogram graph images when spectrogram floor is filled
  • Small refinement to the IR start detection code
  • Changed delay figure with acoustic timing reference back to using IR start time for limited bandwidth measurements (e.g. subwoofers), retained use of the Estimate IR Delay process otherwise
  • Bug fix: Added checks to try and prevent occasional exception when opening the EQ window

V5.19 beta 11 changes:
  • Added Leq traces for the last minute and the last 10 minutes to the SPL logger
  • Added * in front of comment lines in the impulse response text export file and a * Data start comment immediately before the data
  • Trim trailing zeroes when exporting impulse response as text with window applied, but note that the data will be padded with zeroes so the length is a binary power if required
  • Show an error message if the file selected for data import does not have any data REW can read
  • Reset the file filter list before setting a new filter to prevent filters accumulating in the list of available filters
  • The currently selected input is shown in the title of the RTA window
  • Bug fix: If the previously selected input device was no longer available on startup (showing blank in the Soundcard preferences) high CPU usage would occur when attempting to capture audio
  • Bug fix: SPL meter decay rates were too fast
  • Bug fix: Signal generator saving to WAV file could have incorrect frequencies if the chosen sample rate differed from the current REW sample rate
  • Bug fix: Measurement sweep was 3 dB higher than selected if the View option "Full scale sine rms is 0 dBFS" was selected
  • Bug fix: On macOS REW would quit even if Cancel was selected on the unsaved measurement dialog
  • Bug fix: The height of captured graph images was wrong if the selected image width didn't match the default width

Changes in V5.19 beta 10:
  • 24-bit data is now supported where the JVM makes it available (currently macOS and probably Linux)
  • Added 176.4, 352.8 and 384 kHz to the sample rates allowed for ASIO
  • Allow generator to continue running if ASIO output selection is changed - audio will be interrupted briefly, however
  • Added a dBc axis option for the RTA (dB relative to carrier, mainly used to present data relative to the level of the fundamental tone in the signal)
  • Only stop the generator after SPL calibration if the generator was started by REW
  • Added a colour scheme for spectrograms and waterfalls based on Dave Green's cubehelix, see
  • The delay figure with acoustic timing reference now uses the Estimate IR Delay process (cross correlation with minimum phase response) for better results with measurements that do not have HF content (mids or woofers)
  • Added warning to check mic access is allowed in Windows Privacy settings if input is not accessible
  • Added an option to allow/disallow narrow filters below 200 Hz when matching to target
  • Added an option to use IEC263 25 dB/decade aspect ratio when capturing graph images
  • Changed graph image capture to render the graph directly at the chosen width rather than scaling from the current width
  • Added a Tone Burst option to the signal generator
  • The Nimbus look and feel places the file chooser focus on the directory selector instead of the file name field, added a workaround for that
  • Added options to normalise, apply window and export min phase version to the export impulse response as text dialog
  • Updated the impedance measurement setup images to make it clearer that outputs and inputs are from the same device
  • Expanded the RT60 graph help
  • Bug fix: Aborting measurement for exceeding SPL limit should not apply to impedance measurements
  • Bug fix: Acoustic timing ref would be one channel out if using Java drivers with a multi-channel output and the ref output wasn't left or right
  • Bug fix: Spectrogram top level could get set to an incorrect value when changing measurements
  • Bug fix: Starting phase for signal generator linear or log sweeps was not reset to zero for each new sweep (did not affect measurement sweeps)
  • Bug fix: The level of custom filtered pink noise was affected by the low and high cut filter frequencies even if the filters were disabled

V5.19 beta 9 changes:
  • Added input selectors to the Measure dialog
  • Added a soundcard preferences control to set the mapping from REW's output channels to hardware output channels and choose the label to use for them
  • Multichannel output is no longer limited to 8 channels, allowing use of interfaces with higher channel counts on OS X (and probably Linux). The channel mapping control allows any 8 of the available output channels to be selected for use during measurement.
  • Devices with multichannel input are now supported on OS X (and probably Linux)
  • Added two protection mechanisms for sweep measurements, abort if excessive input clipping detected or if an SPL limit is exceeded. Both are controlled on the Measure dialog.
  • Added two protection mechanisms for the signal generator, stop if excessive input clipping detected or if an input SPL limit is exceeded.
  • Added an option to stop stepped sine measurement if excessive input clipping occurs
  • Added sample rate and channel selections for the signal generator WAV file export
  • Altered TS parameters optimisation to improve fitting. Data above 10 kHz is now not used for fit.
  • Show input name in title of SPL Logger window
  • When saving RTA data as measurement can now create measurements from current values, peak values or both (previously measurements were created from current values only)
  • Updated to latest Java 8 runtime, 8u162
  • Added equipment info to the welcome page
  • Bug fix: previous sample rate not restored on startup if it was set higher than 48k
  • Bug fix: RT60 and Clarity traces could be re-selected when changing measurement
  • Bug fix: Spectrogram did not automatically recalculate if the before peak span was changed
  • Bug fix: Harmonic distortion traces normalised to fundamental were shifted if measurement had an SPL offset applied
  • Bug fix: Incorrect cal data values if a cal file was in csv format
  • Bug fix: Update input name in SPL Meter title when input selection changes
  • Bug fix: Distortion noise floor was not lowered when using multiple sweeps to reflect the theoretical improvement obtained (3 dB for each doubling of number of sweeps)
  • Bug fix: ASIO input could time out after changing ASIO output
John Mulcahy
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