File Menu

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 measurements 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. Files with 16, 24 or 32 bit signed PCM samples and 32-bit or 64-bit float samples are supported. 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.
Import -> Audio Data Ctrl+Shift+U
Import audio data from a WAV or AIFF file. Files with 16, 24 or 32 bit signed PCM samples and 32-bit or 64-bit float samples are supported. Only the first 60s (approx) is imported. The path to the file is remembered for the next time the dialogue appears.
Import -> Sweep Recordings Ctrl+Shift+N
Import sweep stimulus and recorded responses from WAV or AIFF files to make offline measurements. Files with 16, 24 or 32 bit signed PCM samples and 32-bit or 64-bit float samples are supported. The sweep stimulus file must be produced by saving a measurement sweep from the REW signal generator with V5.19 beta 7 or later. The path to the files is remembered for the next time the dialogue appears.

Import Sweep Recordings
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 exported file will have a minimum duration of 1 second. 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. The peak of the exported response occurs 1 second after the start unless the IR window has been applied, in which case the export starts at the first windowed sample and the peak location depends on the IR window settings. That can be used to preserve relative timing for exported impulse responses that have been captured with a timing reference: define IR windows for the responses that have the same window ref time and the same left window width - use rectangular windows if the data should not be altered by the window. The exported IR for each impulse will then start at the start of the left window, which will be at the same absolute time for each, so their relative timing will be preserved.

Impulse Response WAV Export Settings

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. The file includes the measurement settings. 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. When the menu item is selected a settings dialog appears that allows a note to be entered and features of the export to be controlled.

Text Export Settings

The entire measurement can be exported (Use range of measurement) or a range can be selected, if the selected range starts before or ends after the range of data within the measurement only the range that overlaps the measurement will be exported. If the data is exported at the measurement resolution 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 custom (log spaced) export resolution is selected REW picks a start frequency that is as close as possible to the desired start but that ensures the exported frequencies include the nominal octave centres (e.g. 20 Hz, 40 Hz etc). Smoothing should be applied when using log exports, the dialog will warn if insufficient smoothing has been selected for the chosen output resolution. Exports can use whatever smoothing is currently applied to the measurement, or any other smoothing selected from the dialog (the selection will not change the smoothing of the measurement in REW, only the smoothing for the exported data). By default REW's export number format uses dot as the decimal delimiter and no digit grouping, for ease of import in other packages subsequently, but Use computer's number format will mean the current format of the computer on which REW is running will be used. The delimiter between exported values can also be selected here, this is the same selection as offered in the export menu. A preview of the export output is shown in the dialog including the first few lines of exported data. The format 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).
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. The same settings dialog appears as for a single measurement, the settings are applied to all the files. Any note entered will appear in all the files, followed by any notes from each individual measurement.
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 -> Distortion spectrum data as text
Export the distortion spectrum data for the current measurement as a text file, if it is a stepped sine measurement that includes spectrum data. Data is exported for the spectrum captured at each test frequency in a stepped sine measurement and for the noise floor. The spectrum data is log spaced, the frequency of each data point is included at the start of each row. The data header includes the frequency steps in the measurement. Note that exported spectrum data should not be used to try and calculate distortion levels as it does not have sufficient frequency resolution to accurately calculate the energy in each harmonic.
Export -> Impulse Response as text
Export the impulse response data for the current measurement as a text file. A dialog is shown to enter a note that is displayed when the data set is next loaded and preview the output. 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.

Impulse Response Text Export Settings

An example of the format is shown below.

    Impulse Response data saved by REW V5.19
    IR is normalised
    IR window has not been applied
    IR is not the min phase version
    Source: Microphone (Umik-1  Gain:  0dB  ), MICROPHONE (Master Volume), Right channel, volume: 0.550
    Dated: 05-May-2014 14:12:40
    Measurement: Artist 3+Q2070Si
    Excitation:  256k Log Swept Sine, 1 sweep at -12.0 dB FS
    Response measured over: 2.2 to 24,000.0 Hz
    4.33353241533041E-4 // Peak value before normalisation
    48000 // Peak index
    131072 // Response length
    2.0833333333333333E-5 // Sample interval (seconds)
    -1.0 // Start time (seconds)

    -3.1990022E-4
    4.7188485E-4
    -3.4590682E-4
    -2.916168E-4
    -3.5212302E-5
            
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. A dialog is displayed to control the format of the export

RT60 Export Settings

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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