REW Beta Release V5.20 beta 6 updates

John Mulcahy

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Apr 3, 2017
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V5.20 beta 6 has gained some support for measuring according to CTA-2034-A Standard Method of Measurement for In-Home Loudspeakers, through the addition of CTA-2034-A shaped noise signals to the signal generator and a control to select either CEA-2010 or CTA-2034-A max SPL limits on the RTA. The shaped noise has a 12 dB crest factor, per the specification.

During the signal generator updates the spkr cal and sub cal options for white periodic noise were removed, as they are only applicable for pink noise. The settings for WAV repetitions and WAV duration are also now remembered for the next startup.

Graph capture has had a few more updates:
  • The aspect ratio options now include all 3 of the IEC263 options of 10, 25 and 50 dB/decade
  • The font size control for graph capture is now in the graph capture dialog rather than the View preferences and there is a separate font size control for the comment
  • There are controls for the comment position and comment alignment, including an "On graph" option that is like the old format in V5.19
The first order low and high pass filters have been added to the miniDSP equalisers.

The default for allow log spacing has been set back to not selected due to the confusion it causes around removing smoothing - log spaced responses are inherently 1/48 octave smoothed to accommodate their 96 points-per-octave spacing without aliasing. It is a good option to select to keep file size and memory use down though.

Added an option to show the measurement notes in a tooltip when the cursor is over the measurement name in an overlay graph, restoring a capability that was present before V5.19.

Exported filter impulse responses now start at sample zero rather than sample 2, so they don't need any timing adjustment for correct phase on import if the option to set t=0 at the first sample is used. Imported impulse responses are also padded with additional zero samples before and after the response if the peak is near the start of the response.

Finally, as an experiment the ability to drag and drop audio files onto the RTA for processing has been added (multiple files can be dragged and dropped at once). I'm not sure how much benefit there is to this, but if you find it useful or have some suggestions for enhancing it let me know below.

The following bug fixes have been included:
  • 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
 
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