

 version 1.73      March 15, 2020
 --------------

 - Added the possibility to show a Hypnogram using sleepstages from the annotations.



 version 1.72      February 8, 2020
 --------------

 - Spectrum Analyzer: added window type "Kaiser".

 - Added the possibility to show a Color Density Spectral Array (CDSA).

 - Use a different color for an annotations' background when it's selected in the annotations list.

 - Added "drag & drop" for loading an EDF file.

 - Fixed a missing feature in the MIT to EDF converter.



 version 1.71      December 21, 2019
 --------------

 - Added an option in the settings dialog to enable to assign varying colors to traces
   when adding traces to the screen.

 - Spectrumanalyzer: switch to exponential notation in case of big numbers.

 - Spectrum Analyzer: added window type "HFT95".

 - Converters: added a ISHNE Holter ECG to EDF converter.

 - Videoplayer: fixed a bug that could cause a wrong synchronization between the video and the EDF file.

 - Import annotations: solved a bug that prevented to import annotations stored in an ASCII file when
   the option "Manual description" was enabled.



 version 1.70      September 7, 2019
 --------------

 - Added an option in the settings dialog to enable an automatic update of the onsettime field
   of the annotation editor when scrolling and a cross-hair is active.

 - Fixed a regression bug that caused the second cross-hair non-functional.



 version 1.69      September 2, 2019
 --------------

 - Fixed a bug in the floating ruler.

 - MIT (Physionet) to EDF converter: fixed a bug regarding offset scaling (baseline & adczero)

 - Fixed a bug in the Print to EDF/BDF function that could produce an invalid file.



 version 1.68      August 5, 2019
 --------------

 - MIT (Physionet) to EDF converter: fixed a bug related to 212 decoding when an odd number of signals is present.

 - Added a shortcut for crosshairs.

 - FFT: Added the possibility to use overlapping blocks.

 - Nihon Kohden to EDF+ converter:  added a workaround for a log file quirk where the
   last character of the version string is missing.

 - Annotation editor: Update the onset time automatically when changing file position and a crosshair is active.

 - Fixed a bug that, when displaying many channels, triggered a false error message
   saying that the system did not have enough memory.

 - Fixed a bug that, when linear interpolation is enabled, artefacts in the form of horizontal lines could appear.

 - Enforce the same fontsize independent from distro and available fonts.



 version 1.67      Januari 26, 2019
 --------------

 - MIT (Physionet) to EDF converter: fix bug in header parser.

 - Spectrumanalyzer: added new window functions (Blackman-Harris, Hann, Nuttall) and improved the dynamic range.

 - Export filtered signals: in the treeview list, show also the custom FIR filters.

 - Print to EDF/BDF: now it can print files which have datarecord durations which are not a multiple
   integer of each other. In that case the samplerates of the signals (on the screen) must have integer values.

 - Fixed a bug that could cause a segfault when printing to EDF or BDF from a file that has
   a small datarecord duration and a very high samplerate.



 version 1.66      November 17, 2018
 --------------

 - Increase maximum number of signals from 512 to 640.

 - Improvements for the MIT2EDF converter.

 - Annotationfilter: added an option in the settings menu to filter only the annotation list
   or also the annotation markers in the signal window.

 - Add dynamic ECG statistic info (heart rate variability) in statusbar when activated.

 - Added a customizable FIR filter.



 version 1.65      July 17, 2018
 --------------

 - WAV to EDF/BDF converter: fixed a bug that caused a wrong conversion in case of 24-bit wave files.

 - Videoplayer: make it work on MAC OS

 - EDFlib: Fixed a bug that could cause not to write the obligatory space between the subfields of patient name and patient additional.

 - Annotations: fixed a bug that caused a wrong background color rendering for the duration of an annotation.

 - Spectrumanalyzer: solved a bug that could cause the mouse cursor to show a "waiting" cursor forever.



 version 1.64      June 2, 2018
 --------------

 - EMSA to EDF converter: fixed a bug that could cause a crash due to invalid free-ing of memory.
   Fixed a bug that could cause to write an invalid character into the EDF header when a signallabel
   name is shorter than 16 bytes.

 - Export filtered signals: include Z-ratio filter.

 - Spectrum Analyzer: added the possibility to change the DFT block size on the fly.

 - Spectrum Analyzer: added the possibility to apply a Hamming or Blackman window.

 - Annotations markers now show also the duration of the event (if present).
   This can be switched off in the settings control panel.

 - Header editor: in case the physical maximum or minimum fields contains a comma as a decimal separator,
   replace the comma with a dot.

 - Update the videoplayer to work with VLC version 3

 - Enable the videoplayer on windows

 - Fixed a bug in the Z-ratio filter (Z-EEG).

 - Annotation editor: added a keyboard shortcut for the delete button.



 version 1.63      March 10, 2018
 --------------

 - Fixed a bug in the mit2edf converter.

 - mit2edf converter: make sure there's always enough storage space in the file for annotations.

 - Powerspectrum dock: fixed a bug that caused the percentage of the first frequency region always 0%.

 - Signalcurve & filtercurve: set font to a fixed pixelsize.

 - Import annotations: added support for annotations in MIT / WFDB (physionet) format.

 - Added a Mortara ECG XML to EDF converter.

 - Print to EDF/BDF & Export Filtered Signals: check polarity of the signals.



 version 1.62      January 7, 2018
 --------------

 - Improve speed when processing annotations for heart rate variability.

 - Update EDFlib.

 - Fixed some memory leaks.

 - Fixed some of-by-one out of boundary memory readings that potentially could cause a segfault.

 - Bugfixes.



 version 1.61      November 1, 2017
 --------------

 - Fixed a bug that caused a freeze/lockup when using the annotationlist filter.

 - Added the possibility to filter annotations based on minimum and maximum interval time.

 - Fixed a regression bug that could cause a crash when using the "reduce signals" tool
   with an EDF+ file.

 - Added a tool to export filtered and or derived signals to a new file.

 - Added the possibility to view the Heart Rate Variability using the annotation list.



 version 1.60      September 16, 2017
 --------------

 - Improve parameter checking for signal composition when loading a montage file.

 - Added a powerline interference removal filter for ECG signals.

 - Added the possibility to fix the EDF-header in case the value for digital maximum
   is lower than or equal to digital minimum.

 - When "whole recording" is selected for the Timescale and multiple files are opened,
   make sure all recordings are completely visible.

 - Fix erroneous reading of the datarecord duration field in the header
   when the number has a sign.

 - Annotations: show the duration using an overlay in the background color.

 - Annotations: show the date when "relative" is unchecked in the annotations list and
   viewtime/fileposition indicator is set to "date real (relative)" in the Settings dialog.

 - Added a workaround for KDE Plasma 5 bug 345023.



 version 1.59      May 8, 2017
 --------------

 - Improved memory management of annotations and annotations sorting algorithm,
   which results in faster processing when a file contains many annotations (> 10000).

 - Fixed a bug with the realtime playback function that caused to playback only the
   first file when multiple files were opened.

 - Fixed a bug in the Timesync -> Jump to dialog.

 - Bugfix in MIT (PhysioBank) converter: use default gain of 200 when adc gain is set to 0.
   From now on, all PhysioBank files can be converted to EDF+ including events/annotations.

 - Don't update the onset time in the annotation editor when changing file position.

 - Solved a bug that that could cause the creation of an incompatible montage file.

 - Don't invert the heartrate trace when the parent trace is inverted.

 - Fixed a bug in the EDF header editor.

 - Fixed a bug that resetted some settings of the program to the standard settings.



 version 1.58      July 10, 2016
 --------------

 - Solved a bug that could display a wrong trace when opening three or more files and
   when re-arranging the order of the traces.

 - Reduce memory usage.

 - SCP-ECG (EN 1064:2005+A1:2007) to EDF+ converter: added support for bimodal compression
   and reference beat subtraction.

 - Make it possible to use the mouse to drag horizontally by keeping the
   middle mousebutton pressed.

 - Fixed a bug in the spectrumanalyzer for files with very high samplerate (>=5GHz).

 - Fixed a bug that could cause a crash when changing file position when no file was opened.



 version 1.57      January 16, 2016
 --------------

 - Update annotation markers when switching between real and relative time.

 - Added an EDF converter for the Biox CB-1305-C 3-channel ambulatory ECG recorder/holter.

 - Spectrumanalyzer: make numbers like frequency more "human readable"
   by using suffix like K(ilo), M(ega), etc.

 - Increase the maximum DFT blocksize to 16777216 (2^24) samples.

 - Don't use the native menubar.

 - Realtime playback function added.

 - Added the possibility to choose between "stairsteps" or linear interpolation
   between two consecutive samples for drawing the traces when number of samples on
   the screen is less than number of horizontal screen pixels.
   You can select it in the settings menu, tab "Other" (Tools -> Options).

 - Added the possibility to open a streaming file from the commandline.



 version 1.56      June 25, 2015
 --------------

 - Fixed a bug that caused the Unisens converter to fail.

 - Added a tool that converts an audiorecording containing an FM modulated ECG waveform to EDF.

 - Added an anti-aliasing filter to the samplerate divider/decimator
   in the file reducer tool. The order of this filter can be choosen.

 - Make it possible to remove just one filter.
   (Before, you could only remove all filters.)

 - Make it possible to close just one file.
   (Before, you could only close all files.)

 - Make the Nihon Kohden converter work with "EEG-1100A V02.00" files.

 - Changed licence to GPLv3.

 - Added a new setting in the settings menu. Now you can set the default amplitude
   that will be applied when you add new signals. Before the default was always 100.

 - Qt has been updated to 4.8.7.



 version 1.55      February 7, 2015
 ------------

 - Added a MIT to EDF+ converter (to convert files from PhysioBank at physionet.org).
   At this moment it supports the "Format 212" and "Format 16".
   Most of the signal files in PhysioBank are written in format 212.
   Other formats will be probably added in future.
   Annotations (in the *.atr or *.ari file) will be read and converted to EDF+ as well.

 - docked Power Spectrum: show percentage when using colorbars,
   in the settingsmenu, it's now possible to select between auto-gain or manual
   sensitivity for the colorbars.

 - Allow to open multiple docked Power Spectrum windows.

 - Correct the screen-offset when inverting a signal that contains a dc-offset.

 - Removed a bug in the "Organize signals" dialog that caused a crash when selecting
   signals in reverse order.

 - Removed a bug that caused a crash when selecting a bessel bandstop/pass filter with
   an order > 10.

 - Increased the maximum number of filters from 8 to 16.

 - Added a Spike filter which can be used to filter out spikes, glitches, fast transients or
   pacemaker impulses.



 version 1.54      October 11, 2014
 ------------

 - The Unisens to EDF converter now supports also files with binary format
   double, int64 or uint64.

 - The Power Spectrum now can plot a logarithmic vertical scale.

 - The docked Power Spectrum now auto-adjust the y-scale only once.

 - The docked Power Spectrum now can also be used in streaming mode.

 - The settings of the docked Power Spectrum will be stored in the montage as well.

 - EDFbrowser can now play video's (Linux version only). Have a look at the manual for the details.

 - Fixed a bug in the filter dialog that could cause some widgets not being shown.

 - Removed compile-errors when using Qt5 (due to bugs in Qt5, it's not advised to use Qt5 yet).

 - From now on, the Mingw-w64 compiler needs to be used for Windows. (see README.txt)

 - Qt has been updated to 4.8.6.



 version 1.53      December 10, 2013
 ------------

 - The activity of the floating ruler will now be stored in the montages as well.

 - Added a filter to the annotationslist.

 - Modified the BI9800 to EDF converter to make it work with 48-hour recordings.

 - Made the viewtime (fileposition) indicator configurable.
   Added the date to the viewtime indicator in the left down corner of the screen.
   This can be configured in the settings menu.

 - Made the window title bar configurable.
   This can be configured in the settings menu.

 - fixed a bug in the EDF+D to EDF+C converter.

 - Added the possibility to save and load different color schemas.

 - Added support for the Unisens fileformat. You will find the converter in the Tools menu.

 - Added the possibility to save and load colorschemas.



 version 1.52      September 7, 2013
 ------------

 - Added an SCP-ECG file to EDF+ converter. Bimodal compression or customized Hufmanntables
   are not supported. Lossless compression using default Hufmanntable and/or 1th/2th differences
   is supported. Character-encoding other than ASCII/Latin-1 is not supported.

 - Added two shortcuts (Plus and Minus keys) to increase or decrease the amplitude
   of the signals (sensitivity).

 - Added the possibility to choose between little endian or big endian encoding in the
   binary/raw to EDF converter tool.

 - Increased the number of pre-defined montage shortcuts from 8 to 12 (keys F1 to F12).

 - Added the possibility to use aliases for the signallabels on the screen.

 - Qt has been updated to 4.8.5.


 version 1.51      May 11, 2013
 ------------

 - Added a Manscan MICROAMPS binary file to EDF+ converter.

 - Solved another bug in the sorting algorithm used for the annotationlist.


 version 1.50      April 20, 2013
 ------------

 - Fixed a bug in the ECG heartrate detection algorithm when a high samplerate was used.

 - Improved the sorting algorithm used for the annotationlist, it was very slow when the annotationlist contains more than 10000 annotations.

 - Added the possibility to adjust the samplerate divider for all signals at once in the reducer/decimator tool.

 - EDFbrowser now checks online for a newer version during startup. This can be switched off in the settings menu.


 version 1.49      February 5, 2013
 ------------

 - Added a binary/raw to EDF converter tool.

 - Solved a bug in the "Import annotations" tool.
   When importing from ascii, wrong onset-times were created
   when there were more than 7 digits after the decimal point.

 - Added a scrollbar to the options- / settingsdialog in order to make it fit
   on screens with low vertical height (modern laptops with 16:9 screen).

 - Removed GTK-style support because it's broken.

 - Updated Qt to 4.8.4


 version 1.48      June 8, 2012
 ------------

 - Added sub-second precision for annotations when using
   the Nihon Kohden converter. (Before, the onsettimes of the
   annotations were rounded to seconds.)

 - Added Z-EEG measurement.

 - Improved the header editor/fixer. Now it accepts files with a maximum of 2048 signals.
   (Before it was limited to files with a maximum of 256 signals.)
   Now, it can also fix the digital minimum/maximum fields in the header
   (e.g. when a broken number was written instead of an integer number).

 - Updated Qt to 4.8.2


 version 1.47      May 7, 2012
 ------------

 - Solved a bug that caused a crash when saving an EDF- or BDF-file
   after importing annotations.

 - Changed the "Export ECG RR-interval" tool in such a way that you can easily
   export the whole recording.
   Also, now it's possible to import them as annotations directly.

 - The tool "Import annotations/events" can now also import the duration
   of an annotation/event (from ASCII- or XML-files).

 - Added the possibility to hide or unhide annotations from the screen.
   (Right-click on an annotation in the annotationswindow.)


 version 1.46      April 13, 2012
 ------------

 - Solved a bug that caused a crash when the "Abort" button was clicked
   when opening a BDF-file.

 - Solved some small bugs and made some enhancements.

 - Updated Qt to 4.8.1.


 version 1.45      March 31, 2012
 ------------

 - Added the possibility to disable scanning for annotations or triggers
   when opening a file, depending of the filesize.
   This can be useful when working with big files that take
   a lot of time to read-in annotations, events or triggers.
   (Due to the nature of the EDF-format, the annotations-channel(s)
   needs to be read from the beginning till the end of the file.)
   In the "Settings -> other" dialog you can adjust the filesize
   which above EDFbrowser will not scan the file for annotations.
   (between 100 MB and 10 GB)

 - extended the capabilities of the header-editor. Now it can also fix
   files that have a wrong number of datarecords written in the header
   or when the file does not end at the boundary of a datarecord.
   See the manual for the details.

 - Improved the ECG heartrate detection algorithm.

 - Fixed some bugs related to signals with inversed polarity
   (i.e. when physical maximum is lower than physical minimum).


 version 1.44      March 4, 2012
 ------------

 - Fixed a bug that caused the "print to PDF / Postscript / Image" to fail
   when non-ascii characters where present in the new filename.

 - Fixed a bug that caused "printing to image" drawing the signals too thick
   and wrong rulers.

 - Fixed a bug in the ECG heartrate detection algorithm that could cause wrong
   measurements with high heartrates (more than 120 bpm).

 - Added Mousewheel zoom-in/out by pressing the Ctrl-key.


 version 1.43      Februari 17, 2012
 ------------

 - Fixed multiple bugs related to annotationmarkers and EDFplus feature to use subsecondprecision in the starttime
   of the file. (Only affects files that uses the subsecond starttime offset EDF+ feature.)


 version 1.42      Februari 1, 2012
 ------------

 - Fixed a problem with EDFbrowser not capable to
   handle filenames and/or directories that contain
   non-ascii characters. From now on, filenames/paths
   will be handled and saved using the local 8-bit
   encoding.

 - Added multi-threading capabilities to the drawing engine.
   EDFbrowser will now use all available cpu-cores in your system
   to speedup the drawing of the signals.


 version 1.41      December 4, 2011
 ------------

 - Fixed a bug (introduced with ver. 1.40) that caused a long time to open
   an EDF+ or BDF+ file when it contains many annotations.

 - Improved printing quality. On some printers or pdf-readers, the signals
   and rulers were hardly visible because the linewidth was too small.

 - Added the possibility to set the colors of the averaging window to black/white.

 - Added the possibility to check for and remove duplicate annotations (Tools menu).


 version 1.40      December 1, 2011
 ------------

 - Added the possibility to reduce the samplerate of one or more signals in the
   tool "Reduce signals, duration or samplerate" (Tools menu).

 - Added the possibility to change/edit the starttime/date of a file with the
   EDF/BDF header editor (Tools menu).

 - The Statistics dialog shows also the number of zero-crossings and the frequency
   of a signal.

 - The Nihon Kohden to EDF+ converter now processes also the Trigger/Marker channel.
   For example, photo- or dc-triggers will be processed by the converter and can be
   displayed by EDFbrowser.

 - Fixed a bug in the signalcurve (graph) of the averaging window, when "invert" was selected,
   the vertical ruler could disappear.

 - Fixed a bug in the floating ruler.

 - Raised the maximum amount of signals per file limit from 256 to 512.


 version 1.39      September 20, 2011
 ------------

 - Fixed another bug related to annotationmarkers and EDFplus feature to use subsecondprecision in the starttime
   of the file.

 - Updated Qt to 4.7.4


 version 1.38      August 24, 2011
 ------------

 - Fixed lots of regression bugs introduced with version 1.37.

 - Fixed a bug related to annotationmarkers and EDFplus feature to use subsecondprecision in the starttime
   of the file.

 - Fixed a bug in the ascii to edf converter that caused to produce an invalid edf file when
   all samples in have value "0.0".


 version 1.37      August 17, 2011
 ------------

 - Removed the limitation that no more annotations can be saved than the amount of datarecords.
   EDFbrowser could only write one annotation per datarecord. From now on, if there are more
   annotations than datarecords, the size (smpls/record) of the annotationchannel will increase
   automatically in order to fit multiple annotations as needed.


 version 1.36      June 16, 2011
 ------------

 - Solved a bug when importing events/annotations from an ascii-file.


 version 1.35      June 16, 2011
 ------------

 - Changed the selectionbehaviour of the signallist in Signals -> Organize.
   Now you can select multiple signals when organizing the signals on the screen.

 - Solved a bug that caused showing the wrong signal when there are duplicate signalnames in a file.

 - Solved a bug that caused a cryptic error message "avg_cnt is ..." when averaging a signal using
   a trigger/annotation which was not inside the selected timewindow.

 - Now it is possible to start/open multiple averagingwindows applied on the same signal.

 - Added the possibility to invert te waveform of the averagingwindow.

 - Solved a bug that caused an errormessage when trying to open a large file (>2.1GB) on a Mac.

 - Removed some bugs in the heartrate detection code.

 - Now you can choose between different kinds of data (R onset or RR-interval or both) when exporting
   the heartrate data.


 version 1.34      May 9, 2011
 ------------

 - Added ECG heartrate detection (it calculates beats per minute from the ECG-waveform).

 - Added the possibility to import annotations, also from discontinues EDF+D or BDF+D files.

 - Added mousewheel scrolling.

 - Added the possibility to save the data from averaging as EDF/BDF.

 - Added the possibility to (re-)organize (re-order and/or invert) the signals on the screen in an easy way
   via Menu -> Signals -> Organize.

 - Modified the annotation editor, from now on annotations with an onsettime more than
   24 hours can be edited as well.

 - Solved a bug that prevented a messagebox to appear when trying to open
   a BDF+D file.

 - Changed the way the onsettime of the annotations are presented.


 version 1.33      March 22, 2011
 ------------

 - Added the possibility to import/extract triggers/events from/recorded on a dc-coupled channel.

 - Added the possibility to perform "averaging" (evoked potentials or other triggers)
   using (imported) annotations, events or other kind of triggers.

 - Added a WAV to EDF converter.

 - Modified the Nihon Kohden to EDF converter so that it will use the electrodenames defined
   by the user in the aquisition software.

 - Fixed a bug that caused writing a wrong value in the datarecorddurationfield of the header
   when saving annotations and when the number in the datarecorddurationfield of the sourcefile
   has more than six digits after the dot.

 - Fixed a bug related to a rarely used EDFplus feature to use subsecondprecision in the starttime
   of the file. Some tools ignored this feature, this has been fixed.

 - Updated Qt to 4.7.2


 version 1.32      December 16, 2010
 ------------

 - Fixed a bug that prevented from updating the screen when in streaming mode
   and after all signals were removed.

 - Fixed a bug in EDFlib.



 version 1.31      December 8, 2010
 ------------

 - Added a streaming mode. The stream must be a "growing" file.
   This mode can be used when you have an aquisitionprogram running that writes EDF or BDF.
   While the aquisitionprogram writes the data to the file, you can use EDFbrowser to watch
   (follow) the actual data. EDFbrowser will regularly check the actual filesize and show the
   last part of the file i.e. the most actual/recent data.

 - Added a "moving average" filtermodel (high- and lowpass).

 - The "View montage" dialogs got a facelift.



 version 1.30      November 24, 2010
 ------------

 - Added the possibility to import events/annotations from a text/csv or XML file.

 - Enhanced the "Export annotations/events" tool. Now you can choose the
   separator character (comma or tab) and you can choose different ISO
   time (and date) timestamps encodings. XML export is possible as well.

 - Solved a bug in de the "adjust filter" dialogue. When using a notchfilter,
   the "order" widget was shown instead of the "Q-factor" widget.

 - Updated Qt to version 4.7.1.



 version 1.29      November 9, 2010
 ------------

 - Added the possibility to adjust the filter settings while watching the result (realtime).

 - Fixed a bug that caused the program to remember the wrong montage.

 - Added a possibility in the ASCII to EDF converter to detect the physical maximum values
   of the signals automatically.

 - The ASCII to EDF converter can also convert to BDF (24-bit).




version 1.28      October 27, 2010
 ------------

 - Added support for reading the "Status" signal in Biosemi data files.
   This can be switched on/off in the settings menu.

 - Added a Biosemi to BDF+ converter.
   It converts the Biosemi trigger inputs to annotations which can be
   read and processed by EDFbrowser.

 - Added an EDF-converter for the Bmeye Nexfin / FrameInspector csv-output
   (beat-to-beat data, bloodpressure waveform, analog inputs).

 - Added zoom-in/zoom-out function using Ctrl++ and Ctrl--.

 - Added keyboard shortcuts and accelerators to the menu's.

 - From now on, the timescale will be saved in montages as well.

 - When opening a file, the last used montage (with that file) will be applied automatically.
   This behaviour can be switched off in the settingsmenu.



 version 1.27      September 27, 2010
 ------------

 - Made all the file-open/save dialogs native.
   This improves the speed in file-listing on some windows-pc's.



 version 1.26      September 7, 2010
 ------------

 - Added an header-editor.

 - Added a file reducer/cropper.

 - Added the possibility to clip the signals to their pane.

 - Solved a bug that rendered the settingsmenu invisible on the Mac.



 version 1.25      August 2, 2010
 ------------

 - Solved a bug that caused writing invalid files and/or caused to reject
   opening a file because of an incompatibility while in reality the file was valid.
   This was caused by a localizationproblem which occured only on systems where
   countrysettings are used that uses a comma as a decimal separator.

 - Changed the name of the "Display" menu to "Timescale".

 - Added the entry "3 cm/sec" to the the Timescale menu.

 - From now on EDFbrowser will use the DPI-settings from the underlying windowmanager
   in order to calibrate the screen. If this doesn't work well in your situation,
   you can still calibrate the screen manually in the settingsmenu.

 - Solved a bug that caused malformed waveforms when opening large files (>4 GB)
   and when navigating to the end of the file. This was caused by an integer overflow.

 - Solved a bug in the ASCII to EDF converter (couldn't open templates).

 - Changed the sourcecode to improve Mac compatibility.



 version 1.24      June 28, 2010
 ------------

 - Solved a bug in the Nihon Kohden to EDF+ converter that caused
   a message "Can not open file *.log for reading,".


 version 1.23      June 23, 2010
 ------------

 - Changed the DFT-algorithm of the powerspectrum to an FFT-algorithm
   in order to avoid long computation times.

 - Added the possibility to adjust the blocksize for the powerspectrum (FFT).

 - Added an extra option to the Annotations export tool.
   Now you can choose to save the annotations in a comma separated
   textfile or in the EDFplus format.

 - Changed the position of the widgets in the annotation-editor window.
   The "Create" button will not be cut-off anymore when a monitor with
   a resolution of 1024 x 768 is used.

 - Qt has been updated to version 4.6.3 (windows version has still 4.6.2).



 version 1.22      june 4, 2010
 ------------

 - Added a docked powerspectrum which updates automatically when you navigate
   throug a file (PgUp,PgDn, etc,).

 - Added the possibility to use different backgroundcolors for different frequencyregions
   in the docked powerspectrum (colorbars).

 - Added an export function for the powerspectrum. This will export
   the data of the powerspectrum to a textfile.

 - Added a cursor to the powerspectrum.

 - Improved the way filters run-in.

 - Added an export function for annotations. This will export
   the annotations to a comma separated textfile.

 - Added a possibility to bind keys F1 ... F8 to predefined montages.
   This way you can quickly switch between different montages by
   pressing F1, F2, etc.

 - Removed a bug in the EDF+D to EDF+C converter that could cause a crash.

 - Removed a bug in the BDF+ to ASCII converter.


 version 1.21      may 11, 2010
 ------------

 - The Powerspectrum window will not block the mainwindow anymore.
   Now you can open multiple Powerspectrum windows (for example,
   to compare different blocks of data and/or different signals).

 - Made a printing option for the Powerspectrum. you can print
   the Powerspectrum to a printer, Postscript, PDF or an image
   by rightclicking on the curve of the Powerspectrum.

 - The ASCII to EDF converter now has a multiplierfactor.
   Cleaned up the code of the converter as well.

 - Fixed a bug that caused writing to a freed memory area
   which could cause a crash when closing the program (mainly
   noticeable on windows).

 - Fixed a memoryleak.


 version 1.20      may 4, 2010
 ------------

 - Added a power spectrum analyzer (Discrete Fourier Transform).

 - Removed a bug that caused wrong vertical ruler values during printing.

 - Removed a bug that caused a wrong screenoffset when changing the offset
   in the signalproperties dialog.


 version 1.19      april 20, 2010
 ------------

 - Added extra filter options: lowpass, highpass, notch, bandpass, bandstop,
   Butterworth, Chebyshev, Bessel, 1,2,3,...8 th order, adjustable bandpassripple
   or Q-factor.

 - Removed a bug in the BDF to EDF converter,
   clicking on "Select all signals" or "Deselect all signals"
   without a selected file, caused a crash.

 - Fixed a bug in the "Print to EDF" and "Print to BDF" function.
   Filter description in header was wrong (i.e. "LPF:" instead of "LP:").

 - Fixed a bug in the Filter Dialog. When adding a new filter when signals have
   different samplerates, initialisation of the new filter could happen with wrong
   samplerate, causing a wrong frequency of the filter.

 - Updated Qt to version 4.6.2


 version 1.18      januari 12, 2010
 ------------

 - added an annotation editor

 - solved a bug that could cause an errormessage "can not open file for reading"

 - solved a bug that could cause a false positive when checking the EDF-header
   of an EDFplus file (patientfield)


 version 1.17      november 4, 2009
 ------------

 - solved a bug in load_montage_dialog.cpp that caused a crash when
   loading a montage and a label was not found


 version 1.16      october 28, 2009
 ------------

 - solved a bug in the BDF+ to EDF+ converter

 - solved a bug in the XML parser

 - solved a memoryleak when using filters

 - solved some minor bugs

 - added a floating ruler

 - made some minor cosmetic changes

 - updated Qt to version 4.5.3


 version 1.15       june 18, 2009
  -----------

  - solved a bug that could cause a crash when using crosshairs


 version 1.14       april 27, 2009
  -----------

  - solved a bug & optimized the code in the BDF to EDF converter

  - updated Qt to version 4.5.1


 version 1.13       april 20, 2009
  -----------

  - added a BDF(+) to EDF(+) converter


 version 1.12       april 2, 2009
  -----------

  - bugfix release, solved a crash when removing a signal or a filter


 version 1.11       march 31, 2009
  -----------

  - added an EDF+D to EDF+C converter, it can convert discontinues files
    to continues files (interrupted recordings to un-interrupted recordings),
    can be used for BDF+D files as well

 - added an Emsa (*.PLG) EEG to EDF+ format converter

 - updated Qt to version 4.5.0 which has better GTK-style support when Gnome is used


 version 1.10       februari 13, 2009
  -----------

  - solved a bug that generated a false "read error" message
    when using filters at the start of the file
    (this bug appeared in version 1.09)


 version 1.09       februari 11, 2009
  -----------

  - solved a bug in the "Print to EDF/BDF" tools
    which could cause a crash

  - solved compilerwarnings in GCC 4.3.2 (warn_unused_result)


 version 1.08       december 15, 2008
  -----------

  - added a slider for navigating

  - solved a bug in the BDF+ compatibility checker

  - disabled the possibility to open discontinuous files
    (interrupted recordings) because of technical reasons



 version 1.07       november 5, 2008
 -----------

 - improved speed when a long displaytime is used

 - added support for the BDF+ format. Read the details here.

 - solved some minor bugs



 version 1.06       october 23, 2008
 -----------

 - solved a minor issue with the built-in EDF-checker

 - updated Qt to 4.4.3




 version 1.05        september 17, 2008
 -----------

 - added a Finometer (Beatscope) to EDF format converter.
   (Finometer is a non-invasive stationary blood measurement and beat to beat
   haemodynamic monitoring system made by Finapres Medical Systems)
   read the documentation for the details.

 - solved a bug that causes a crash when a file was opened via the cmd-line
   with an unknown extension.

 - updated Qt to 4.4.1




 Version 1.04          may 2, 2008
 -----------

 - added an ASCII to EDF format converter




 Version 1.03          march 31, 2008
 -----------

 - improved printing resolution

 - solved an issue with printermargins and fonts thanks to new printerframework in Qt 4.4.x

 - added option to "print" to an EDF or BDF file
   now you can extract one or more signals and write it to a new EDF file
   or you can combine signals from several files into one new EDF file
   printing to a BDF file is supported as well
   read the manual for the details

 - added option user defined displaytime (pagetime)

 - added option jump to end of recording

 - dropped the maximum datarecordblocksize of 61440 bytes requirement for EDF+ files
   from now on EDFbrowser will accept EDF+ files with  larger blocksizes




 Version 1.02          februari 11, 2008
 -----------

- solved a bug that potentially could crash the program when opening
  EDF+ files with a durationfield in annotations




 Version 1.01          januari 21, 2008
 -----------

- solved two bugs that could create errors in timesyncing between multiple files

- added support for large files (>2.1GB)

- updated Qt to version 4.3.3




 Version 1.00           januari 8, 2008
 -----------

 - Initial release.

