File Menu

Measure Ctrl+M
Make a new measurement (brings up the measurement panel)
Save Measurement Ctrl+S
Save the current measurement in a binary format with the extension ".mdat". The path to the file is remembered for the next time the dialogue appears.
Open Measurement Ctrl+O
Load a measurement from an mdat file. The path to the file is remembered for the next time the dialogue appears. Mdat files can also be opened by dragging them onto the REW main window.
Save All Measurements Ctrl+Shift+S
Save the data for all measurements in a single file with the extension ".mdat". A note can be entered that is displayed when the data set is next loaded. The path to the file is remembered for the next time the dialogue appears.
Save Filters Ctrl+Alt+S
Saves the EQ filter settings for the current measurement in a binary format with the extension ".req". A note can be entered that is displayed when the filters are next loaded. The path to the file is remembered for the next time the dialogue appears.
Open Filters Ctrl+Alt+O
Load a set of EQ filters for the current measurement from a .req file. Any note saved with the settings will be displayed. If the .req file has more than one set of filters a selection box is offered to choose the set to load the filters from. Req files can also be opened by dragging them onto the EQ window or the EQ filters window.
Import Frequency Response Ctrl+I
Import frequency response data (SPL or impedance) from other applications or load FR data which has been saved in a text format. See Importing Measurement Data for details. The path to the file is remembered for the next time the dialogue appears.
Import Impedance Measurement Ctrl+Alt+I
Import impedance measurement data from other applications which has been saved in a text format. See Importing Measurement Data for details. The path to the file is remembered for the next time the dialogue appears.
Import Impulse Response Ctrl+Shift+I
Import an impulse response from a WAV file, an AIFF file or a .pcm file (raw data) as produced by ETF from Full Range measurements using the File -> Write Impulse As *.pcm option. The sample rate must be specified manually for .pcm files as it is not contained in the file (ETF shows the sample rate in the pop-up which appears after exporting the response). WAV and AIFF files can be mono, stereo or multi-channel, the channel to be imported is chosen when loading the file. Only Signed PCM files are supported, with 16, 24 or 32 bit samples and only the first 1,024,576 samples are imported. If the peak of the imported IR is within 1% of the beginning of the file REW assumes the IR is from a full FFT with the second half of the file containing samples at negative time, so the data is rotated to place the peak in the middle. To re-scale the impulse response for a desired peak SPL figure in the frequency response use the Scale Response controls in the Impulse graph group. There is a setting in the Analysis Preferences to control whether the t=0 time for the imported response is placed at the first data sample or at the peak of the impulse response. The path to the file is remembered for the next time the dialogue appears. WAV, AIFF and .pcm files can also be opened by dragging them onto the main REW window. N.B. Mic/Meter calibration, soundcard calibration and C weighting compensation are not applied to imported impulse responses.
Export -> Impulse Response as WAV
Export the impulse response for the current measurement in WAV format, written as mono or stereo signed PCM data. The peak occurs 1 second after the start. The dialog provides options to choose the number of bits per sample and to select whether or not to normalise the response so that the peak value is unity (0 dBFS). There are also options to apply the current impulse response window settings to the response before exporting it, or to export a minimum phase version of the measured response. 32-bit sample width is recommended if the application using the data can accept this, particularly if the response is not normalised.
Export -> Filters Impulse Response as WAV
Export the impulse response of the filters for the current measurement in WAV format, written as mono or stereo signed PCM data, with the impulse response starting 2 samples into the file (the first 2 samples are zero). The response length is 128k samples (131,072). The dialog provides options to choose the sample rate, number of bits per sample and to select whether or not to normalise the response so that the peak value is unity (0 dBFS). 32-bit sample width is recommended if the application using the data can accept this, particularly if the response is not normalised. When exporting as stereo the first response selected is placed in the left channel, the second in the right.
Export -> Filter Settings as text
Export EQ filter settings for the current measurement in a plain text format. The file includes the speaker setting and target level for the measurement. This file is a convenience format only, REW cannot load filter settings from text files - use the .req format to save and reload settings. The path to the file is remembered for the next time the dialogue appears. An example of the format is shown below.

            Filter Settings file

            Room EQ V4.00
            Dated: 07-Jan-2007 17:20:32

            Notes:Example filter settings

            Equaliser: DSP1124P
            sampledata.txt
            Bass limited 80Hz 12dB/Octave
            Target level: 75.0dB
            Filter 1: ON  PA   Fc   129.1Hz (  125 +2 )   Gain -18.5dB  BW/60  4.0
            Filter 2: ON  PA   Fc    36.8Hz (   40 -7 )   Gain -15.5dB  BW/60 10.0
            Filter 3: ON  PA   Fc    99.1Hz (  100 -1 )   Gain  -3.5dB  BW/60  1.0
            Filter 4: ON  None
            Filter 5: ON  None
            Filter 6: ON  None
            Filter 7: ON  None
            Filter 8: ON  None
            Filter 9: ON  None
            Filter 10: ON  None
            Filter 11: ON  None
            Filter 12: ON  None
            
Export -> Measurement as text
Export the measured data for the current measurement as a text file. A note can be entered that is displayed when the data set is next loaded. The file includes the measurement settings. If the measurement has smoothing applied the exported data will be at one quarter of the smoothing interval (for example, at 1/12th octave for 1/3rd octave smoothed data). If the data is not smoothed it will be exported at the resolution REW is currently using for it. That may be 96 PPO log spaced if the Allow 96 PPO log spacing Analysis preference is selected or linear spaced at the FFT resolution. Linear spaced exports are very large files (typically more than 1 MB), if a log spaced export is preferred apply smoothing before export. These text files can be re-loaded using Import Measured Data. The path to the file is remembered for the next time the dialogue appears. An example of the format is shown below, it is compatible with the .FRD format. Comment lines start with *, data lines begin with the frequency, then the SPL in dB and finally the phase in degrees (0.0 if the measurement does not have phase information)

            * SPL measurement data saved by REW V4.00
            * Source: EDIROL UA-1A, Digital Audio Interface, Right channel, volume: no control
            * Format: 256k Log Swept Sine, 1 sweep
            * Dated: 07-Jan-2007 17:28:07
            * REW Settings:
            *   C-weighting compensation: Off
            *   Target level: 75.0 dB
            * Note: Example measurement export
            * Measurement: Jan 7 17:28:07
            * Frequency Step: 0.36638016 Hz
            * Start Frequency: 1.8310547 Hz
            * 
            * Freq (Hz) SPL (dB) Phase (degrees)
            1.831 63.953 0.0
            2.197 64.767 0.0
            2.564 65.103 0.0
            2.930 65.121 0.0
            3.297 65.028 0.0
            
Export -> All measurements as text
Export the measured data for all loaded measurements as text files in a chosen directory. The file names use the measurement titles.
Export -> Measurement as MLSSA .frq
Export the measurement in the MLSSA .frq format. The path to the file is remembered for the next time the dialogue appears.
Export -> Distortion data as text
Export the distortion data for the current measurement as a text file. A dialog is displayed to control the content and format of the export

Distortion Data Export Settings

An example of the file format is shown below. Comment lines start with *. Data lines begin with the frequency, then the fundamental SPL (if selected for export) in dB, then the selected distortion measurements. Note that if the end frequency for the export is not configured to automatically adjust to suit the highest harmonic selected, the number of harmonics on each line will reduce as frequency increases, eventually leaving only the second harmonic and THD values.

            * Distortion data saved by REW V5.01
            * Dated: 16-Sep-2012 18:52:27
            * Measurement: Sep 16 18:52:27
            * Frequency Step: 3 ppo
            * Freq(Hz) Fundamental (dB) THD (%) H2 (%) H3 (%) H4 (%) H5 (%) H6 (%) H7 (%) H8 (%) H9 (%) H10 (%)
            20.000 76.068 0.016 0.014 0.002 0.001 0.004 0.003 0.001 0.002 0.002 0.001
            25.198 76.133 0.011 0.008 0.000 0.001 0.001 0.006 0.001 0.001 0.001 0.003
            31.748 76.181 0.015 0.013 0.002 0.002 0.002 0.001 0.002 0.005 0.001 0.001
            40.000 76.215 0.014 0.013 0.001 0.003 0.001 0.002 0.002 0.001 0.003 0.001
            
Export -> Impulse Response as text
Export the impulse response data for the current measurement as a text file. A note can be entered that is displayed when the data set is next loaded. The file includes the speaker setting, target level and settings for the measurement. The path to the file is remembered for the next time the dialogue appears. An example of the format is shown below.

            Impulse Response data saved by REW V4.00
            Note: Example impulse export
            Source: EDIROL UA-1A, Digital Audio Interface, Right channel, volume: no control
            Dated: 07-Jan-2007 17:28:07
            Measurement: Jan 7 17:28:07
            Sweep level: -12.0 dBFS
            Response measured over: 1.8 to 200.0Hz
            0.0015657541807740927  // Peak value
            48000 // // Peak index
            131072 // Response length
            2.0833333333333333E-5 // Sample interval (seconds)
            -1.0 // Start time (seconds)

            2.2897795E-9
            2.273612E-9
            2.2564515E-9
            2.2382682E-9
            2.2222117E-9
            
Export -> RT60 data as text
Export the RT60 data for the current measurement as a text file. A note can be entered that is displayed when the data set is next loaded. The file includes both octave and one-third octave results if these have been generated. The path to the file is remembered for the next time the dialogue appears.
Export -> Set text delimiter
Set the character to use as a delimiter between values on a line when exporting a measurement as a text file.
Remove Current Measurement Ctrl+Backspace
Remove the current measurement. An unsaved measurement can be recovered using Restore Last Removed.
Remove All Measurements Ctrl+Shift+Backspace
Remove all measurements. Unsaved measurements cannot be recovered!
Restore Last Removed
Restore the last measurement that was removed, placing it at the end of the measurement list. Note that this is only available for individual measurements, if Remove All Measurements is used it is not possible to restore.

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