REW Windows 64-bit installer

REW Windows 64-bit installer V5.20 beta 38b

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Changes in V5.20 beta 38b:
  • Show the cause of failure to load an ASIO driver in the error message
  • Bug fix: Accommodate sparse FlexASIO.toml files
  • Bug fix: The FlexASIO config file backend selection was not restored
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Updated FlexASIO control panel to accommodate latest FlexASIO release
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Changes in V5.20 beta 38:
  • Added a control panel for the FlexASIO driver
  • Added a bit monitor for the input data at the bottom of the main window
  • Show a warning message if using Pentium N35 with the 64-bit REW build, with recommendation to use the 32-bit build instead
  • Bug fix: RTA captures with controls showing would put controls under levels panel
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Changes in V5.20 beta 37:
  • Allow stepped sine levels down to -144 dBFS and end frequencies up to 80 kHz
  • When a group of measurements is loaded or saved remember the note saved with them (if any) and show it when next prompting for a note when saving all measurements as a group
  • Allow the signal generator to adapt to screen height down to 600 pixels
  • Added option to choose .txt or .frd as the extension when exporting all measurements as text
  • Bug fix: Room simulator absorption values were not updated when loading a preset
  • Bug fix: Cal file parsing could fail if comma is the decimal delimiter
  • Bug fix: Deleting a cal entry would cause an exception
  • Bug fix: Room simulator and scope images saved as JPEGs could have a pink hue
  • Bug fix: An exception could occur when first setting up ASIO4All if a USB mic was selected as the input before an output had been selected
  • Bug fix: REW could crash when starting to Measure with ASIO4All if the ASIO4All driver issued a resetRequest when asked to create the audio buffers
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Changes in V5.20 beta 36:
  • Bug fix: Null pointer exception could occur on startup when using the "Separate cal file for each input" option
  • Bug fix: THD trace could be incorrect when first selecting the Distortion graph with the axis set to dBr or percent
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Changes in V5.20 beta 35:

The room simulator and the alignment tool have been updated for this release.

Room simulator

It has been quite a while since the room simulator was updated, so there are a basket of changes.



A set of 5 presets has been added, which are remembered for subsequent startups. A comment can be entered that is saved with the presets. There is also a button to capture the current Main mic response and keep it on the graph as a reference as changes are made.



There are buttons to create measurement files from the simulator output that can then be saved as mdat files, either a single file showing the response with all sources active or individual files for each source. In both cases the response saved can be either that of the main mic position alone or an average of all the selected mic positions, showing the span of the results as an underlay.



There are check boxes to keep the L and R speakers symmetric across the width of the room (so moving one will move the other to maintain symmetry), or to allow them to be moved as a pair keeping the distance between them the same. Buttons have been added to place the head mid-width across the room or midway between the L and R speakers. If the room has left and right speakers the angle between them at the head is shown when the mouse is over the head position. There is now a check box to use the same delay for all subwoofers, rather than having to adjust each individually.

Finally, there are buttons to capture images of the room view panel and the response graph.


Alignment tool

The alignment tool has a greater delay range of +/- 50 ms and has gained some additional buttons to (hopefully) help with phase alignment.



The Level phase at cursor button will shift both measurements by the same amount (so no relative delay change, and no effect on aligned copies or the aligned sum) so that the phase of the first measurement is more or less horizontal around the cursor frequency. That should make it easier to manually align phase, removing the slope due to the local group delay of measurement 1.

The Align phase slopes at cursor button adjusts the delay of the second measurement to align the phase slopes around the cursor frequency, so both have the same local group delay. Aligning slopes rather than the phase itself can make it easier to spot when one measurement could be inverted for a better phase match.

The Align phase at cursor button adjusts the delay of the second measurement to align the phases around the cursor frequency.

The graph cursor is now shown in the alignment tool phase graph, it follows the cursor frequency in the alignment tool magnitude graph. The alignment tool phase responses also update if the window settings of a measurement being aligned are changed.


There are a couple of minor changes:
  • The EQ window target settings panel has gained a right click menu to copy and paste target settings from one measurement to another
  • Scope image captures are now drawn at the desired width rather than scaling an image from the scope panel width, so the captures have better resolution

Bug fixes in this release are:
  • When a measurement was selected on the alignment tool dialog the currently selected alignment smoothing was not applied to it
  • When the alignment tool smoothing was changed the phase traces did not update correctly to include the current delays
  • Mic cal C weighting selection was not applied to cal data after a restart
  • On macOS or Linux output channel selections could be invalid after changing to a device with fewer channels than the previous device
  • Update the J-test displayed frequency figure when the sample rate changes
  • Removed code that tried to compensate for the effect of input volume changes on SPL calibration
  • An exception could occur when the SPL logger was started
Changes in V5.20 beta 34:
  • Added a jitter test signal to the signal generator in the Tones group
  • Added a right click menu for the waterfall and spectrogram controls to copy and paste settings between measurements
  • Added check boxes on the waterfall and spectrogram controls to enable or disable the automatic regeneration of the plot when settings change
  • Moved the ISO 3382 parameters on the RT60 graph data panel into a separate window
  • Added an Analysis preference (selected by default) to use only the right hand IR window width when deciding the minimum valid frequency in the response
  • Added a View preference to use dashed strokes on overlay graphs
  • Added a check box on the merge operation to optionally blend the merge over 1/3 octave either side of the merge frequency
  • RTA mic cal data was only updated when the RTA started, now updates if cal changes while RTA is running
  • Stepped sine continues to measure distortion even if "Show distortion" button is deselected
  • Improvement in RT60 Decay calculation
  • Small improvement in RT60 calculation for longer decays
  • Bug fix: Group delay trace could be incorrect for log spaced data with 1/48 octave smoothing
  • Bug fix: ASIO driver selection could fail for a sample rate causing an exception
  • Bug fix: Extra settling time may be required for stepped sine measurements when using a silence interval
Changes in V5.20 beta 33:
  • When multiple measurements are loaded load them as a set then select the last rather than adding and selecting each individually. This speeds up loading by not triggering calculations that may be required when a measurement is selected, for example generating a spectrogram when on the Spectrogram graph page
  • Suppress low quality RT60 decay results
  • Bug fix: Dragging wav files onto the RTA for processing was not working
  • Bug fix: Loading a file with multiple measurements while on the Spectrogram graph with the Wavelet spectrogram selected could result in an exception
  • Bug fix: Could not select the manual settings button on RT60 decay
  • Bug fix: Guard against out of range error when fetching harmonic phase during stepped sine measurement
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Changes in V5.20 beta 32:
  • Bug fix: Alignment tool aligned copy had the delay applied with the wrong sign
  • Bug fix: Delays in the comments for the Alignment tool aligned sum measurement had the wrong sign
  • Bug fix: Ohms axis could become selected for SPL measurements on the SPL & Phase graph when there was a mix of SPL and impedance measurements
  • Bug fix: Limits dialog was not working properly for new axis types
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Bug fix: source info parsing to extract sweep level used for measurement could throw an exception when opening a file
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