File Menu

Import Measured Data Ctrl+I
Used to import data from other applications or to load 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 Impulse Response Ctrl+I
Used to import an impulse response from a WAV file or a .pcm file (raw data) as produce 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 files cam be mono, stereo or multi-channel, the channel to be imported can be chosen when loading the file. Only Signed PCM WAV 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 Impulse Response controls in the Impulse Response Controls graph group. The path to the file is remembered for the next time the dialogue appears.
Save Channel Filter Settings Ctrl+S
Saves the EQ filter settings for the current channel in a binary format with the extension ".req". A note can be entered that is displayed when the settings are next loaded. The path to the file is remembered for the next time the dialogue appears.
Load Channel Filter Settings Ctrl+L
Load a set of EQ filter settings for the current channel from a .req file. Any note saved with the settings will be displayed. If the .req file has more than one channel of filters a selection box is offered to choose the channel to load the filters from. All channel EQ filter settings will be overwritten by the settings in the file.
Save Filter Settings All Channels Ctrl+Alt+S
Saves the current EQ filter settings for all channels in a binary format with the extension ".req". A note can be entered that is displayed when the settings are next loaded. The path to the file is remembered for the next time the dialogue appears.
Load Filter Settings All Channels Ctrl+Alt+L
Load a set of EQ filter settings for all channels from a .req file. Any note saved with the settings will be displayed. All EQ filter settings will be overwritten by the settings in the file.
Save Measured Data Set Ctrl+Shift+S
Save the measured data for all channels 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.
Load Measured Data Set Ctrl+Shift+L
Load a set of measured data from a .mdat file. Any note saved with the data set will be displayed. Any data the Wizard has measured for a channel will be overwritten by data from the file, if the file contains data for that channel. The path to the file is remembered for the next time the dialogue appears.
Load House Curve Ctrl+Shift+H
Load a set of data defining the desired shape of the target response. The data is used to define an offset curve that is added to the traces generated from the bass management responses for the speaker types defined for each channel. The file is plain text consisting of pairs of frequency and offset values separated by spaces, tabs or commas. Linear interpolation is used between the pairs of values, the first and last values are used for frequencies below and above the range of the data respectively.

The house curve would typically be used to define a boost for the subwoofer range, such as that defined by the data points below. These points give a boost that is 6dB at 20Hz, dropping to 0dB at 80Hz and above. The boost remains flat at 6dB below 20Hz. A more elaborate curve might include a roll-off at high frequencies (if full range equalisation were being applied). For more on this topic see the discussion in the BFD forum here: http://www.nextlevelav.com/forum/showthread.php?t=800
                House Curve data
                
                20 6.0
                80 0.0
            
When a house curve has been loaded the symbol is displayed next to the Target trace value in the Filter Adjustment graph group. The name of the file can be displayed via the Calibration/Data Files entry in the View menu.
Remove House Curve
Remove the House Curve (resets the target response to a flat line at the Target Level).
Export Channel Impulse Response as WAV
Export the impulse response for the current channel in WAV format, written as mono 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 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.
Export Channel Filter Impulse Response as WAV
Export the impulse response of the filters for the current channel in WAV format, written as mono signed PCM data, with the response starting 1 second into the file (preceding samples are all zero). The response length is 128k samples (131,072). 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). 32-bit sample width is recommended if the application using the data can accept this, particularly if the response is not normalised.
Export Channel Filter Settings as text
Export EQ filter settings for the current channel in a plain text format. The file includes the speaker setting and target level for the channel. This file is a convenience format only, the Wizard 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 V3.26
            Dated: 14-Dec-2005 16:24:33

            Notes:An example of filter settings export

            Equaliser: FBQ2496
            Left
            Bass limited 80Hz
            Target level: 75.0dB
            Filter 1: ON  PEQ   Fc   129.1Hz    Gain -18.0dB  BW Oct  0.167
            Filter 2: ON  PEQ   Fc    36.4Hz    Gain -13.5dB  BW Oct  0.250
            Filter 3: ON  PEQ   Fc    99.1Hz    Gain  -4.5dB  BW Oct  0.033
            
Export Channel Measured Data as text
Export the measured data for the current channel 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 measurement settings for the channel. 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.

            SPL measurement data saved by Room EQ Wizard V3.26
            Source: Realtek AC97 Audio, LINE_IN, Right channel, volume: 0.375
            Format: 48000Hz sampling, Log Swept Sine, 10ms pre-impulse, 500ms post-impulse
            using soundcard cal file D:\RoomEQ_Wizard\test files\Realtek48k.cal
            Dated: 05-Dec-2005 22:17:35
            Wizard Settings:
              Tracking: On
              C-weighting compensation: Off
              Measurement level: -9.0 dBFS
              Target level: 75.0 dB
            Note: An example of measured data export
            Channel: Left, Bass limited 130Hz

            10 24.09
            11 14.03
            12 20.83
            13 23.91
            14 30.94
            15 32.99
            16 31.76
            
Export Channel Impulse Response as text
Export the impulse response data for the current channel 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 measurement settings for the channel. 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 Room EQ Wizard V3.26
            Source: Realtek AC97 Audio, LINE_IN, Right channel, volume: 0.375
            Dated: 05-Dec-2005 22:17:35
            Channel: Left, Bass limited 130Hz
            Measurement level: -9.0 dBFS
            Response measured over: 10.0 to 20,000.0Hz
            Peak value: 0.048474423587322235 at index 48000
            Response length: 131072 samples
            Sample interval: 2.0833333333333333E-5 seconds
            Start time: -1.0 seconds

            -1.1968059E-6
            -4.963369E-6
            1.1610139E-6
            5.567701E-6
            5.0363514E-7
            -9.497037E-7
            -1.2131918E-6
            7.230116E-7
            

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