Room EQ Wizard Revision History

V4.11 10th March 2008 New features

• Level of sweep on left ref channel adjusted to get ref input to -6dB FS
• System delay measurement compensates for measurement bandwidth for sweep end frequency >= 200Hz
• Added label to show distance equivalent to the System Delay
• Data import tolerates a mixture of decimal delimiters

V4.11 Bug Fixes

• Start time of captured data on scope plot was incorrect when using left channel as ref
• Meters were not being disabled properly when sig gen or spl meter stopped
• When REW was used with a Creative X-Fi the signal generator would only work once

V4.10 8th March 2008 New features

• Added spectrum and RTA displays
• Added RT60 graph and added RT60-related traces and info on Impulse graph, can export RT60 data as text via the file -> Export menu
• Added low crest factor pink and white Periodic Noise sequences to the signal generator, with ability to save PN sequence to a WAV file
• A left channel loopback connection can be used as an automatic calibration reference, selected via the soundcard settings as an alternative to using a soundcard cal file
• Added an Analysis Settings option to calculate the response of the reference channel when using a left channel loopback as the ref, response is shown in the soundcard cal trace
• When using the left channel as a calibration reference the system delay is estimated and shown in the Details panel of the measurement info, if the cursor is hovered over the value the equivalent distance in metres and feet is shown in a tooltip
• Measurement start frequency can now be specified, measurements starting at >= 20Hz use a measurement signal that begins at half the start frequency, sweeps starting below 20Hz have an initial linear sweep from DC to 10Hz then log from 10Hz to the end
• Added Analysis setting to enable IR Decimation, reducing sampling frequency of the IR for low frequency measurements to greatly reduce data size (as much as 30 times for measurements up to 200Hz) and increase processing speed
• Added a Clip indicator in the SPL Meter to warn of clipping on the input
• Inverse C weighting correction is not applied below 5Hz
• Logarithmic interpolation is applied between data points in mic/meter calibration files
• Added option in house curve settings to use logarithmic interpolation between data points
• Added image size tags to the help file images for faster and more accurate loading
• Restored the graph showing the A/B/C weighting responses in the Mic/Meter settings help
• Revised startup system property setting to help appearance on Mac
• Improved fractional octave smoothing of traces
• Added Ctrl+Shift+1 and Ctrl+Shift+2 shortcuts for full and half octave smoothing respectively
• Allowed file import to handle numbers with digit grouping
• Improved quality of graph JPEGs when JPEG is larger than original graph
• Improved speed of preview thumbnail for image files in file chooser
• Settings panel no longer set to Always On Top
• Clear Peaks action only enabled when there is a list of peaks found to be cleared
• Changed default for using thick traces on Mac to false (causes very poor drawing performance)
• Updated R-DES EQ setting to allow 5 filters
• Changed wording on check/set levels combo box to choose sub or main speaker
• Show unsaved channels in exit warning dialog on separate lines
• Allow data import files to have .txt, .dat and .frd extensions and remember the import file name independently of other text files
• Sweep settings now defaults to expanded so new users are aware settings are there
• Disabled trace labels are drawn in system disabled colour
• Zoom/measure box shows units in delta values, time deltas also show equivalent distance in metres and feet
• Impulse response window defaults in Analysis settings are remembered for next startup
• Removed LaF selection from the View settings, defaults to System LaF
• Improved cursor readout on graphs so maxima are returned
• Added dither option for sine gen output
• Added controls for replay and record buffer settings
• Made a new icon for the EQ filters button
• Simplified the SPL meter (removed tracking and harmonic levels) and incorporated it in the toolbar
• Changed VU meters to show Left and Right instead of just Input
• Added impulse response envelope (aka ETC) to the Impulses graph page
• Enabled auto calculation of IR envelope when trace selected & removed "Generate All ETC" button
• Measurements pane updates while data files load
• Progress bar updates when calculating IR envelopes (ETC curves), smoothed envelopes or octave filtered results
• Added Schroeder integral to Impulse Controls graph group
• Added View settings to set the font size for the interface elements and the graph axes (applied after restart)
• Moved the REW log files into a folder called "REW"
• Changed the impulse start (zero) time to be first point response exceeds 10% of the peak amplitude (1% of peak energy)
• Octave filters can be applied to measurements using the control on the Impulse graph page, traces are drawn with dashed lines if a filter is active
• Shortened graph names
• Show EQ icon for .frq files in file chooser
• Transferred additional waterfall controls to graph panel
• Added individual enable buttons for the x, y and z waterfall perspective controls
• Waterfall and LF Decay plots now cover full range of measurement, 96 points per octave with 1/24th octave smoothing
• Waterfall plot walls have depth shading
• Changed LF Decay to Spectral Decay
• Changed "Load measurement" and "Load filters" to "Open measurement file" and "Open filter file", use "O" in corresponding shortcuts instead of "L"
• Changed log file location on Mac to ~/library/logs/REW

V4.10 Bug Fixes

• Corrected index entries in spl meter and sig gen help TOC
• Sweep end freq was not checked against samplerate/2 when sample rate changed
• Changing sample rate while sig gen was running would stop sig gen from working
• Exported frequency responses could have digit grouping applied and would fail to re-import
• Bass management internal filter cutoff was reset to 80Hz when changing the bass mgmt slope
• Restored ability to control Java Sound Audio Engine volume from wave volume spinner
• Impulse response calc would fail if the captured data was all zeroes (can happen if the input volume is set to zero)
• Averaged Trace stroke type was not updated according to View settings
• "Freq tracks cursor" in signal generator was not limited to generator min (10Hz)
• Impulse response export of measurement or filter set didn't list latest measurement
• Third harmonic distortion value was always displayed as <0.01%
• Filter BW in Hz display was incorrect after the BW setting was changed
• SC Cal and Mic/Meter cal trace labels are now drawn in disabled color if cal files not loaded
• SPL meter could lock up if data returned from soundcard was all zeroes while tracking a generator frequency
• The selected y Axis type was reset when changing between graph groups
• Corrected the scaling of energy-time curves
• Fixed an error in the .frq export format
• Various GUI updates to correct layout and formatting problems on Mac

V4.00 22nd January 2007

A great deal has changed from V3.29 to V4, far too much to list everything here. The key changes are:

• User interface revised to make it much less cluttered and more measurement-centric
• Measurement by log sweep only
• Sweep lengths of 128k, 256k (default), 512k or 1M samples
• Multiple sweeps per measurement with synchronous pre-averaging
• Impulse respose plots can be normalised or absolute and can be plotted inverted
• The default soundcard selections from the OS can be used
• 800 x 600 screens are supported
• Target response allows selection of 12 or 24dB/octave crossover slopes
• Filters can be sorted by frequency, magnitude or Q
• Graph plotting has been improved for smoother trace rendering and better colour saturation
• Mouse wheel can be used to zoom in/out on graphs
• Save graph as jpeg uses lower compression for higher quality images
• Filter settings exported as text include the coarse/fine frequency values for the DSP1124P
• Added file preview information for WAV, jpg, gif and png files in file chooser
• Added an approximation of the R-DES parametric filters

V3.29 2nd Feb 2006

• Impulse response import now accepts WAVE files as well as .pcm files. Format must be Signed PCM, with 16, 24 or 32 bits per sample. If the file is multi-channel can choose which channel to import
• Impulse response export now offers choice of 16, 24 or 32 bits per sample with/without normalisation and allows two channels' responses to be exported as a stereo WAV
• Added controls to the Impulse Response Controls page to re-scale the impulse response to achieve a desired peak SPL figure in the frequency response
• Added selector to display the full range Energy-Time Curve in place of the impulse response with adjustable smoothing
• Changed shortcuts to allow Alt+1,2 etc to select the channel, Ctrl+1,2, etc to select graph group and Ctrl+Shift+3 to apply 1/3rd octave smoothing. The number for each channel appears in the channel's tab
• Shortened the default names for the surrounds to SL, SR, SBL, SBR (use Restore Default Names to apply them) so that the tabs fit within the default width of the app on startup
• Added an SMS-1 equaliser setting
• Added an overlay capability to the waterfall plot with variable transparency
• Added measurement notes for each channel accessed via View -> Measurement Notes or by right clicking on a channel's tab in the filters pane. Notes are saved/restored with measurement data sets and are also shown in italics in the tool tip for each channel's tab in the filters pane and in the file chooser preview for mdat files.
• Filters tab text is black if channel has data, grey if not
• No longer restore initial mute states on exit to avoid possible feedback loop if Line In was not muted in replay volume before startup
• Bug Fixes
  • IR window extent lines were drawn one pixel offset to the right
  • Spectral Decay and Waterfall data were not cleared when a new data file was loaded
  • Incorrect limits checking on some of the values of the Set Extents dialog
  • Trace generation could produce index out of data range
  • Help topic link broken for bfd midi configuration

V3.28 16th Jan 2006

• Added File menu entries to load and reset a "House Curve" to define the desired target response shape - typically used to define a boost for the lower part of the subwoofer range
• Added a field to show the bandwidth in Hz of parametric filters
• Added renaming of channels by right clicking the tabs in the filters pane, names remembered for next startup
• Speaker type and cutoff settings in the filters panel are remembered for the next startup
• Settings used in the Set Extents dialog are remembered for the next startup
• Added Ctrl+3 as a shortcut for applying one-third octave smoothing to current channel, with corresponding entry in the Analysis menu
• Added 1/2 octave as a smoothing step in the Trace Smoothing selections
• Made the fractional octave smoothing much faster
• C^-1 icon now shown by spectral decay and waterfall plot trace values if generated data has C weighting compensation applied
• Measurement info now states ETF5 PCM Impulse Response if IR was imported from a pcm file
• Changed default freq axis setting for the Filter Adjustment group to logarithmic
• Cal files and imported data files can now have any extension, though default is to show files with extension .cal in the cal file dialog and .txt in the import data dialog
• Added preview to the .pcm file chooser
• Added a cancel option to the 'load mdat file' confirmation dialog
• Paths to mic/meter and soundcard cal files are remembered after cal data has been cleared
• Added a help entry listing all the keyboard shortcuts
• Added note to soundcard calibration help to turn off C weighting compensation when making check measurement with loopback connection
• Removed serial port selection menu for non-Windows systems
• Don't force graph axis min extents on new sweep measurements
• Bug Fixes
  • Wizard would not close if an audio input device had never been selected
  • Stepped sine measurements did not work
  • ctrl+shift+S was assigned to saving measured data set and sending channel filters to unit, sending filters to unit changed to ctrl+shift+F
  • Measurement info in data summary was changed when Apply Windows was used
  • Spectral decay and waterfall plots were cleared when Apply Windows was used
  • Trace smoothing factor was common to all traces, should be independent
  • Cursor line on back wall of waterfall was sometimes slightly offset from correct position
  • Pressing Cancel on the Set Target Level progress dialog did not cancel the procedure
  • The exported filter impulse response included filters which were disabled

V3.27 22nd Dec 2005

• Impulse responses shown as absolute dBFS and %FS values rather than normalised to the impulse peak value. Y axis settings on the IR controls page are updated after each measurement to suit typical impulse magnitudes for the measurement range
• Baseline for dB plots moved to -180dB
• Now render to intermediate images to get rid of the sluggish cursor movement when viewing complex plots like waterfall and impulse responses
• Default for waterfall antialias changed to on
• Added z slider to waterfall controls to adjust perspective effect
• Added button, menu entry and shortcut (ctrl+shift+J) to save the graph image as a jpeg
• Aux channel now always labelled "Aux" (was "Sub2" for equalisers other than TMREQ)
• Added Measurement Averaging graph group allowing averaging of frequency and impulse responses
• BUG FIX: Final slice of waterfall could have old data in it after regenerating the plot
• BUG FIX: Waterfall numeric display was always from left channel
• BUG FIX: Warning message that "Impulse peak is not where it should be" could appear when it should not

V3.26 18th Dec 2005

• New features
  • All 20 filters of an FBQ2496 can be set up
  • Added a Low Frequency (10Hz to 750Hz at 48k sample rate) Spectral Decay plot, providing a 2D view with the t=0 response plus 8 slices at configurable spacing with configurable slice window width
  • Added a Low Frequency Waterfall plot (also 10Hz to 750Hz) providing a 3D view over a configurable time period with configurable window width for each slice. Note that for comparable results to ETF 5 waterfalls, use a window width that is 1.4 times the ETF gate time.
  • Added an Oscilloscope-style plot to show the generated sweep and the captured data as time-based plots (static view of captured signals, not live data)
  • Added fractional octave smoothing for frequency response traces
  • ETF *.pcm impulse responses (exportable from Full Range measurements) can now be imported (allows the Low Frequency Spectral Decay plots and Waterfall plots to be generated from the data)
  • Each channel's impulse response and the impulse response of the channel's filters can be exported as 16-bit mono WAV files
  • Added a new Generic equaliser type, mainly for use in generating filter impulse responses for export. Offers parametric, low pass, high pass, low shelf, high shelf and notch filters with centre frequencies from 10Hz to 22kHz in 0.1Hz steps.
  • Cursor position now shown at bottom right corner of graph when cursor within the graph area
  • Impulse response windows can now be offset from the impulse peak using the Window Ref Time control in the impulse response controls graph group. The position of the window ref is shown by a vertical dashed red line, the window extents are shown by vertical dashed black lines. If the ref or the extents are changed, the new window extent is shown by a highlighted region on the graph until the new values are applied to the response
  • Soundcard tab added to filter panel, shows measurement results for soundcard including -3dB points, flatness and 1kHz distortion figures
  • Added a View menu entry to show the filenames of the mic/meter and soundcard calibration files, if loaded
  • Check box added to each multi-channel graph group to offset the traces from one another
  • Dragging the mouse with the right button pressed shows deltaX and deltaY measurement cursors as well as drawing a zoom box. To zoom to the dragged area, click within the box when text underneath indicates this is allowed, any other action dismisses the box.
  • Added a "Delete channel data" option to the analysis menu, deletes all measured data for the current channel
  • Added a button to set the graph axis extents to manually entered values
  • Added a "trace offset" spinner for each channel that shifts the trace vertical position in steps of 0.1dB. The data values are not affected, only the position on the graph. To apply the offset to the data values, use the "Add to Data" button. Note that data generated from a sweep will revert to its original level if the "Apply Windows" button on the Impulse Controls is used as this recalculates the frequency response.
  • Lowest frequency of measured data derived from sweeps is set according to width of windowed impulse to exclude invalid data for frequencies whose period is less than the window width
  • Measured and Corrected traces for data which has had inverse C weighting applied show a "C" icon next to the value on the graph traces
  • The frequency resolution corresponding to the current impulse response window width (Pre ref plus post ref) is shown on the Impulse Response Controls graph page
• Useability Enhancements
  • Selection of graph groups has been added to the view menu with associated Alt+1/2/3/… shortcut keys
  • Reformatted SPL Meter and Signal Generator to better match single channel operation, selection of input channel provided via radio buttons on the SPL meter, Signal generator signals are on both L and R output channels, VU Meters changed to a mono version
  • Control for post-impulse window duration and Apply Windows button are accessible on the Filter Adjustment page as well as the Impulse Response Controls page
  • Expanded text in warning messages for soundcard cal and target level setting
  • Further revisions to the input/output calibration procedure and accompanying help text, changed measurement level setting to simplify it and remove dependence on input cal (now done before input volume setting), changed input vol setting procedure to use the Wizard's signal generator as the cal signal source
  • Improved action of axis scroll bar sliders, especially at high zoom levels. Arrow buttons move 1% of span, clicking in track moves half of span (min 5Hz, 500us).
  • Graph axis settings (range & position) for each trace group are now independent of one another, and for the impulse response groups there are two independent sets of settings, one for the dB axis and the other for %
  • Added 0.1 and 0.2 as Y axis grid steps and allowed higher zoom levels
• Other Improvements and Changes
  • Longer settling time for measurements of Target Level
  • Modified the measurement sweep to extend down to DC to improve accuracy and remove windowing artefacts from impulse responses. Upper end of sweep can go to half the sampling rate.
  • Default shape for pre-impulse window changed from Rectangular to Hann
  • Default impulse window limits changed to 500ms post, 10ms pre (but pre impulse time increased when end frequency of sweep is below 1000Hz
  • Corrected name of Hann window
  • Default Y axis for impulse response plots changed to dBFS
  • Dialogs centred on graph area
  • When tracking is active rms numeric and bar displays on SPL panel show the DFT reading
  • Soundcard measurement can be selected/viewed like other measurements
  • Moved selection of peak data table display from graph menu to view menu
  • Harmonic distortion displays are disabled when harmonics of the frequency being tracked exceed half the audio sampling rate
  • Graph upper limit changed to 30kHz
  • Signal generator upper limit changed from 20k to half soundcard sample rate
  • Limit find peaks upper frequency to 500Hz (detection unreliable at higher frequencies and 500 is already beyond the range of modal resonances correctible by EQ)
  • Warn if peak input level of a measurement is low
  • Warn if soundcard cal file sample rate does not match current sample rate
  • Catch a NullPointerException during init that can occur if the Windows theme is not supported by the JRE
  • Tweaked the trace colors
  • Menu entries for reading/downloading filer settings moved from "Unit" menu to "Equaliser" menu, Unit menu deleted
  • Plotting of measured and corrected data and filter responses revised to ensure extrema always shown regardless of freq axis scale
  • The Wizard only adjusts axis settings on the Filter Adjustment page to frame new measurements, and then only if the current range does not encompass the new measurements. It will not alter the axis settings on any other graph pages.
  • No longer force linear freq axis for measurements ending at 200Hz or below
  • Start Frequency spinner is disabled for sweep measurements (not used, sweeps start at DC)
• Bug fixes
  • Some files using comma as decimal delimiter were wrongly imported (cal files and data files)
  • Graphing of measured traces was broken during manual and stepped sine automatic measurement
  • Input vol setting could give incorrect result and leave vol at max or min
  • X axis Zoom out button did not work when slider was on right edge
  • Spl axis top/bottom levels sometimes not set correctly to encompass measurement
  • Bottom horizontal grid line was sometimes not labelled
  • Track Cursor would try and update generator frequency when X axis was not frequency
  • Graph trace tooltips were not being displayed
  • Manual Measurement and Auto Measurement buttons were not disabled during auto measurements
  • Apply Windows button in Impulse Controls group was sometimes not enabled when it should have been

V3.25 30th Oct 2005

• BUG FIX: Fixed obfuscation problem that stopped measurement data sets saved with 3.23 or 3.24 being loaded again
• BUG FIX: Find peaks would not locate any peaks when run on loaded measured data sets

V3.24 30th Oct 2005

• BUG FIX: Fixed broken links in help files
• BUG FIX: Set Target Level did not run unless cal had not been done on input or output

V3.23 28th Oct 2005

• Warnings about overwriting filter settings and measured data only given if there are settings or data to be overwritten
• Use antialiased rendering on zoom cursor and zoom box (if selected in Graph menu)
• Revamped the graph traces display to provide multiple groups of traces chosen via a drop-down box in the graph panel
• Line colour/style for traces is shown next to trace name
• Removed "lin"/"log" indicator at RHS of graph Y axis, now shows "Hz" or "s" instead
• Added units indicator at top of Y axis
• Added display of impulse responses, normalised to the peak value
• Added display of the window used when calculating frequency response
• Only use CZT for 0.1Hz response resolution when end Freq 1kHz or less, above that use conventional FFT for 0.183Hz resolution
• Cut size of all channels 10Hz to 20kHz sweeps mdat file from 37M to 10M
• Reduced RAM usage, peak now 76M when all 9 channels have been used for 10Hz to 20kHz sweep measurements
• Added export of Impulse Response data as text
• Added support for FBQ2496 with Midi setup, only 12 (of 20 possible) filters per channel in this release
• Added progress monitors during Midi downloads
• No longer capture and process the left channel for sweep measurements, all calcs are relative to the stimulus
• Added support for soundcard cal file with menu entries to measure response, load and reset the cal data and save a measurement as cal data
• Cal file responses are drawn across centre of graph regardless of graph Y axis position
• Traces for mic/meter and soundcard cal are only enabled (and so can only be selected) when a file has been loaded
• Removed the loopback indicator and the menu entry to enable loopback
• Removed the SPL Limiter check box and associated functionality
• BFD Pro (DSP1124P or FBQ2496) can have filters from any channel downloaded (previously was only sub or sub2), with choice of whether to send the filters to the left or right bank
• Setting measurement level has been revised, should be much easier to handle now
• Setting input volume control and calibrating the SPL meter reading have been separated, can cal the reading independently after setting the input volume
• Making measurements (and setting target level) are allowed even if the input level has not been set, SPL cal has not been done or measurement level has not been set - get a once-per-session warning message
• Connections message for target level only shown once per session
• Dutch help files removed (too far out of date)
• BUG FIX: loading a set of measured data would give null pointer exception if there was no measured data for the current channel
• BUG FIX: Exporting measured data as text would report "No measured data" from sweep measurements
• BUG FIX: Corrected numerical ill-conditioning in biquad magnitude calc for very high Q and low Fc
• BUG FIX: Set Target Level could set a level outside the allowed range of the target level spinner
• BUG FIX: Setting Target Level chooses sub or speaker cal depending on speaker type selected for the channel, prev only used sub cal on the Sub channel
• BUG FIX: Setting measurement level chooses sub or speaker cal depending on speaker type selected for the channel, prev only used speaker cal

V3.22 30th May 2005

• Measurement Changes
  • Added support for microphone/meter calibration files, compatible with the ETF5 cal file format
  • Added graph trace showing response of mic/meter cal including C weighting when selected
  • Changed to using Chirp Z Transform after impulse response extraction to allow arbitrary frequency intervals in response curves. Frequency interval is 0.1Hz for spans up to approx 2kHz, increases according to span above that reaching 1Hz for a full 10Hz to 20kHz sweep.
  • Added control for the period over which the impulse response is analysed to produce the frequency response. Default is 600ms, adjustment is in 50ms steps. If the frequency response appears noisy, try reducing the window period.
  • Impulse responses are saved as part of saving a set of measured data
  • In exported measurement data the frequency and spl values are now separated by a single space (used to be a comma and a space)
  • Now accept space as well as comma and tab as delimiters in imported data files
  • Made the sweep measurement clipping warning more sensitive
  • Removed the 2.5dB offset that was applied when importing calibrated ETF LF data as it is no longer needed for data exported from current versions of ETF5
  • Changed recommended input sensitivity for AV processor input from 2V to 0.5V - most soundcard output levels are too low for a 2V input, resulting in high volume settings.
  • BUG FIX: C-weighting compensation was not being applied for sweep measurements
  • BUG FIX: Overall response level for sweep measurement was offset if measurement level was not -18dB
• User Interface Changes
  • Find Peaks results now shown in a table with ability to sort columns ascending or descending by clicking in header
  • Added extra file menu entries to save or load a single channel of filters instead of all channels at once, ctrl+S and ctrl+L now call up the single channel save/load of filter settings, ctrl+alt+S/ctrl+alt+L save/load settings for all channels
  • Customised the file chooser dialogs to show the roomeqwizard icon for .req, .mdat and .cal files
  • Added custom file preview to file chooser dialogs, for .req files shows Wizard version, EQ type, notes and whether file has one or all channels; for .mdat files shows Wizard version, notes and data summary for each channel; for .txt and .cal files shows first 16 lines of text. Notes no longer displayed in a popup after loading a file.
  • Moved the options for Allow doubled filters and Drop filters if < 2dB into the Equaliser menu
  • Swapped the positions of the Sig Gen panel and the Filter panel
  • Split the command button panel into one part for measurement controls, one for filter optimisation controls
  • Moved the Y axis scrollbar under the axis zoom buttons
  • Added 0.5dB per division as the new minimum vertical grid step
  • Changed the Filters+Bass Mgmt trace to Filters+Target
  • Unit menu items to read filters and read speakers are only enabled when TMREQ is selected as the equaliser and the OS is Windows
  • Repositioned prompts for spl and measurement level cal to appear over graph window
  • Moved the file entries for writing filter settings and measured data as text into an export submenu, exporting filter settings now exports the current channel only rather than all channels
  • No longer automatically present dialog to export measured data in text format after a measurement
  • If choose not to exit with unsaved data the dialog to save all measured data is presented
  • Made new zoom button icons, slightly increased button sizes to suit
  • Give a warning the first time filters are loaded in a session to say any existing settings will be overwritten
  • The warning that loading an MDAT file will overwrite existing data is only given the first time the option is used in a session
  • Message about connections and volume level only shown before the first measurement in a session
• Other Changes
  • The RS232 serial comms dll is only copied across on Windows platforms
  • Allow master gain control via the wave spinner if the Java Sound Audio Engine is selected for replay (workaround for Mac platforms with limited JavaSound implementation)
  • If the Wizard cannot find an exact port mixer match for a selected soundcard device it will fall back to using any port mixer it can find (workaround for old Soundblaster Live cards)

V3.21 15th May 2005

• Logarithmically swept sine measurement added, complete response measurement now typically completes in less than 10 seconds
• Added "Sweep" as a step in the Auto measure to activate log sweep measurement
• Removed the linear/log sweep buttons in the signal generator, replaced them with separate entries in the sig type box
• Added graphical level meters in the signal generator panel
• Allow the generic OS soundcard drivers to be selected even if they offer no controls, may mean the Wizard can be used on platforms that do not have full JavaSound support or with sound cards that do not offer full drivers
• Allow the control panels to scale up as window size is increased
• Revised the action of the frequency scroll bar to provide finer control at high zoom levels/small spans
• Improved filter optimisation for BFD Pro

V3.20 8th May 2005

• Added distortion displays to SPL Meter panel, showing levels of 2nd and 3rd harmonics of the test frequency. Rearranged the panel to suit, also rearranged the signal generator panel a little to keep appearance consistent
• Added graphical level meters in SPL Meter panel to fill some empty space :)
• Tweaked the SPL limiter loop to reduce settling time
• Bug fix: SPL calibration value was not being saved if the soundcard had no input volume control
• Added help index files in English and Dutch help directories and links to the index and home page at the bottom of each help file - mainly to provide links back to somewhere central for the web version of the help pages
• Added notes on optimiser Q/BW limits in filter adjustment help

V3.19 2nd May 2005

• BFD Pro can now be set up over a Midi connection
• Added a "Comms" menu, put COM port and Midi input and output port selection in there
• Tweaks to helptext for unit.html, equaliser.html, soundcard.html, welcome.html (link to download site for J2SE V5.0 for Max OS X), avpcomms.html
• Tweaks to the English help text for makingmeasurements.html, inputcal.html, filteradjustment.html
• New helptext files added: comms.html, bfdcomms.html
• "Generate Soundcard Debug File" added to the Soundcard menu to generate a text file with debug info following reports of problems with some multi-channel soundcards (RME 9632)
• When the equaliser is BFD Pro the Aux tab is renamed to Sub2
• Fixed a bug that caused wrong measurement values to be recorded when the SPL limiter was active

V3.18 23rd April 2005

• State of Invert Filters check box remembered for next startup
• Prevent rounding of left/right frequencies to scroll bar step size when zooming
• Typo corrected in filterpanel help
• Expanded Equaliser help to add control ranges
• Use 46.875kHz sample rate for BFD Pro filters
• Elaborated on connections in dialogue for setting measurement level
• Corrected typo in dialogue for calibrating SPL meter and made clear it uses the internal AV processor speaker cal signal
• Extra debug for sig gen in event of problems opening or writing to the replay device

V3.17 13th April 2005

• Allowed measurement over any frequency range within 10Hz to 20kHz (upper limit was 1kHz)
• Revised text below Automatic Measurements button to allow room for higher frequencies
• Fixed bug in measurement progress indicator at small spans with log steps
• Corrected BFD Pro bandwidth control and updated Equaliser help accordingly

V3.16 12th April 2005

• Fixed bug preventing Surr B R speaker setting and filters from being read
• Fixed bug when reading or writing filters for all channels
• Minor update to Filter Adjustment help text to allow for BFD Pro filter setting differences from TMREQ settings

V3.15 10th April 2005

• Show 1dp on cursor frequency when span very small
• Update graph immediately when choosing to replace existing measurements
• Improve operation of zoom in via freq axis button

V3.14 9th April 2005

• Added support for the BFD Pro. The equaliser (TMREQ or BFD Pro) is selected via a new Equaliser menu.
• Added scroll bars for the graph axes
• Added logarithmic step options for the measurement step
• Moved filter reset to the Equaliser menu, added an option to reset all filters in all channels, added shortcut keys ctrl+del and ctrl+shift+del
• Ceiling channel renamed as Aux with 12 filters allowed
• Zoom selection box is now shaded
• Variable zoom with middle button no longer centres graph on cursor
• Replaced the SPL axis grid control by zoom buttons
• Moved the lin/log freq axis button to the right hand end of the axis
• Fixed a zoom bug when span became less than 1Hz

V3.13 beta 29th March 2005

• F1 key now assigned to the help file corresponding to user's language (was assigned to English help)
• Build number added to version in Help -> About
• Style sheet for help now common for all languages
• Percentage font sizes replaced by relative to work around JavaHelp bug
• Pink noise filter coefficients now update correctly after sampling rate change
• Corrected background colour of SPL axis span control and bass management cutoff control for systems not using white as background

V3.12 beta 27th March 2005

• Catch added for any errors during startup
• First version packaged with installer

V3.11 beta 25th March 2005

• Background of SPL meter shown red if input is not calibrated
• Loopback correction is disabled if it exceeds 20dB, indicator turns red
• Extended graph area zoom capabilities to provide zoom to area on right button, centre and variable zoom on middle button, variable zoom without centering by using right then left.
• COM port selection in Unit menu only offers ports that exist when the Wizard starts up