- 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. 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 response length
is 128k samples (131,072) and 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 (0dBFS).
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 (0dBFS).
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).
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 -> 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

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: -22.0 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.