Software

• Avisoft-SASLab Pro
• RECORDER
• Tutorial
  
  
• Downloads
• Revision history &
  News

Hardware

• UltraSoundGate
• Ultrasound microphones
• Ultrasound playback
  
  
• Links

Sales

• Price list &
  Ordering information
• Service

Animal Sounds

• Birds
• Bats, batcalls.com
• Insects
• Frogs
  
  
• Rodents
  
  
• Text books

News and Revision History

Avisoft-RECORDER, version 3.5 (17 March 2010)

• LANC and SMPTE time code signals fed into the UltraSoundGate digital inputs can be decoded, displayed and can be used as a trigger source.
• RECORDER USGH now also supports old UltraSoundGate 116 units that were manufactured before 2004 (firmware versions 1.x)

Avisoft-SASLab Pro, version 5.0 (16 March 2010)

• An additional classification option 'Frequency Contour Templates' (with options for normalized durations and time warping) allows to classify whistle-like vocalizations in a more general way.
• A section label option on the Pulse Train Analysis tool ('Group Analysis' > 'use section labels as groups') allows to count pulses that occur within labeled sections.
• New Automatic Parameter Measurements option 'Harmonic-to-noise ratio' implemented.
• The new option 'relative stddev of entire element' in the Automatic Parameter Measurements allows to quantify for instance frequency or amplitude modulation.
• The newly implemented 'time derivative' parameters in the Automatic Parameter Measurements tool that are available through the 'more...' button can help to quantify frequency changes within whistle-like calls.
• The CORRELATOR module (version 3.0) can now also process one-dimensional data such as waveforms, envelopes and spectra.
• The newly implemented LANC and SMPTE time code decoding options (Analyze/Time axis format...) allow to synchronize video with (ultra)sound recordings more easily.

Avisoft-SASLab Pro, version 4.53 (22 Januray 2010)

• An additional smoothing option in the Graphic Synthesizer tool allows to create more natural synthetic vocalizations.
• The new batch processing options 'Sort files using APM classes', 'Sort files using template spectrograms (triggered CCF)' and 'Sort files using template spectrograms (continuous CCF)' provide support for reviewing large amounts of automatically triggered sound files.
• The new command 'Edit'/'Synthesizer'/'Insert while noise...' and 'Insert pink noise...' simplify the creation of noise signals. Graphic Synthesizer .ARR files can now also be opened by drag & drop.
• The spectrogram window 'Tools'/'Remove erased spectrogram sections from waveform' has been improved in order to minimize distortions. Depending on the selected parameter settings, this command can now function very smoothly.
• The new Spectrogram Export Parameters option 'create multiple (page) files' allows to save very long spectrograms into a series of individual .wmf, .tif or .bmp graphics files.
• The new command "Edit"/"Format"/"Restore the original time scale of a time-expanded recording..." and the associated batch command option allow preparing time-expanded bat detector recordings for playback more easily.
• Anti-aliasing option added to the Graphic synthesizer.
• Zero phase FIR filter option added.

Avisoft-RECORDER, version 3.4.2 (08 January 2010)

• Digitally signed UltraSoundGate device drivers now also support the Windows x64 editions.
• Automatic offset compensation for the UltraSoundGate recording hardware implemented.
• The recording level meters now have a logarithmic scale.
• The new command Options/Configuration management/Presets provides a few application-specific configuration presets.
• A high-pass filter option has been added for removing low-frequency noise.
• An additional 'Gate with' trigger option expands its versatility for certain applications (e.g. combining a time program with an external TTL signal).
• The new trigger option 'reject wind/rain' can help to prevent undesired excessive triggering while more or less stationary broad-band noise signals are present.
• The time program option has been further expanded for adjusting the time intervals relative to the current sunrise or sunset.
• The playlist command now offers a timetable option for playing .wav files at predefined absolute clock times.
• The file name options have been further expanded.
• The new command 'Play'/'Playback Volume...' allows to modify the playback level digitally.
• The new 'RECORDER USGH NIDAQmx DIO' version allows to use the UltraSoundGate units along with additional National Intruments Digital I/O units such as the NI USB-6501 in order to extend the number of available digital input and output lines.

Avisoft-SASLab Pro, version 4.52 (02 June 2009)

• The playback functionality has been revised in order to enable playing back individual tracks of multichannel sound files (new command File/Playback settings...).
• The calibration command has been improved in order to simplify absolute sound pressure level measurements with calibrated microphones/hydrophones (command Tools/Calibration...).
• Voice note .wav files created by the new RECORDER software option "voice notes" can now be displayed and played in SASLab Pro.
• The command 'Edit'/'Filter'/'Frequency Domain Transformation...' > 'Lowpass' has got an additonal option titled '1/f' that allows to convert white noise into pink noise.
• Octave and Third-Octave Analysis options have been implemented (command Analyze/One-dimensional Transformation...)

Avisoft-RECORDER, version 3.4 (22 May 2009)

• The newly implemented GPS option (Options/GPS settings) allows to attach any NMEA compatible GPS receiver (either a Bluetooth GPS receiver, a USB GPS mouse or a handheld GPS unit) to the notebook PC in order to simultaneously acquire the geographic locations of the recorded .wav files. The resulting log files are common .gpx or .kml files that can be imported into GIS applications such as Google Earth. See also the RECORDER page.
• A new batch mode supports processing large numbers of animals in drug testing procedures.
• Addional file name options added.
• In order to simplify the configuration management, the default configuration files now reside in the folder ...username/Documents/Avisoft Bioacoustics/Configurations/RECORDER (before they were located in the hidden folder C:/Users/username/AppData/Roaming/Avisoft Bioacoustics).
• The external digital trigger sources can now be inversed in order to enable active high TTL logic.
• The UltraSoundGate models 116H, 416H, 816H and 1218H (with the new firmware version 1.1) can now be configured to ouput the internal RECORDER USGH software trigger state through the TRG socket, which enables the synchronization with other recording systems.
• GPS coordinates are now also written directly into the .wav file header ('GPS ' chunk).
• Labeling functionality added (commands 'Monitoring'/'LOG file comment', 'Options'/'Create labels from digital input events...', 'Options'/'USV monitoring setup wizard...')

Avisoft-SASLab Pro, version 4.51 (29 January 2009)

• The dynamic range of the spectrogram display has been increased in order to better visualize low-level sounds.
• The Graphic Synthesizer has got the new command 'Tools'/'Copy contour...' that allows to copy the contour of one parameter to another.
• The software can now directly open the unusual .wav file format of the Pettersson BatSound software.
• The new command 'File'/'Specials'/'Remove channels...' allows to remove one or more channels from multichannel files
• The newly implemented command 'Tools'/'Labels'/'Georeference labels...' can plot sound file labels (that represent species) on a map, which can be useful for analyzing field surveys.

Avisoft-SASLab Pro, version 4.50 (24 October 2008)

• The new options 'Power spectrum (averaged)' and 'Power spectrum (level units, averaged)' on the 'One-dimensional Transformation' have been implemented in order to support the calculation of average spectra over very large periods of time.
• The log file tool ('Tools'/'DDE Parameters / Log File...') has been improved by adding the new file formats .xml and .sql, which simplifies the measurement data export to external databases.
• The batch processing tool (command 'Tools'/'Batch processing...') now allows to process entire folders (option "process all .wav files in the selected folder")
• The command 'File'/'Specials'/'File properties...' can now display the GPS coordinates created by the RECORDER software.

Avisoft-SASLab Pro, version 4.40 (21 June 2008)

• The new auto scroll command supports reviewing long spectrograms without repeatedly clicking at the scroll bar (spectrogram window command Tools/Scroll/auto scroll).
• The classification batch processing commands (including the Automatic Parameter Measurements with activated classification option) now provide a summarizing table that displays the number of indentified elements of each class for each processed sound file.
• A georeferencing tool for combining geographic coordinates (acquired by a handheld GPS receiver) with the sound files recorded by a digital field recorder has been added (command File/Specials/Georeference .wav files...). The created .gpx or .kml files contain the filenames and coordinates of the sound files, which can be displayed in GIS applications such as Google Earth. In this way, the navigation through sound files that have been recorded during field surveys can be simplified.
• In order to simplify the configuration management, the default configuration files now reside in the folder ...username/Documents/Avisoft Bioacoustics/Configurations/SASLab (before they were located in the hidden folder C:/Users/username/AppData/Roaming/Avisoft Bioacoustics).

Avisoft-RECORDER, version 3.3 (27 December 2007)

• The new USV real-time monitoring option for counting and measuring rat or mice ultrasonic vocalizations provides instant results on the acquired USVs. Various descriptive statistics items such as the total number, total duration, mean duration or standard deviation of the detected USVs can be reported (screen shot).
• New 'whistle tracking' trigger option for detecting soft whistle-like signals that are buried in the background noise floor.
• New 'permanent (limited)' trigger option for applications that require specific pre-defined recording durations.
• The 'UltraSoundGate DI' trigger (RECORDER USG and USGH versions) now provides exact sample precise external triggering.
• Simultaneous sound activated triggering on multichannel audio interfaces with several logic stereo pairs now works correctly.
• New test signal playback tool for testing the equipment in long-term monitoring applications.

Avisoft-UltraSoundGate 116H (05 November 2007)

• Introducing the new single-channel UltraSoundGate devices USG 116Hb, 116H and 116Hm, which can be operated at sample rates of up to 1 MHz at 16 bit resolution. The top-of-the-line model 116Hm has been further shrunk for convenient hand-held use without sacrificing its ruggedness.

Avisoft-UltraSoundGate 416H, 816H, 1216H, Player (07 September 2007)

• Introducing new bus-powered multichannel UltraSoundGate devices USG 416H, 816H and 1216H, which provide up to 12 channels that can be sampled at up to 750 kHz at 16 bit resolution.
• Introducing the bus-powered UltraSoundGate Player 116 that provides a 16 bit D/A converter and an adjustable power amplifier in a single box. This product enables mobile playback in the field on new laptop computers that do not have a PC-Card slot (PCMCIA) for the NI-DAQCard 6062E anymore.
• Introducing two new compact electrostatic speakers that are suited for playing back very high ultrasonic signals.

Avisoft-SASLab Pro, version 4.40 (03 November 2007)

• The software now uses the standard Windows folders for program files, application data (configuration files and temporary data) and documents (sound files, measurement results, etc.). It is therefore no longer required to run the software with administrator rights.
• The new batch command "Classify .wav or .son files (show results in a single table)" allows to classify either sound files (.wav) or proviously saved binary spectrogram files (.son) by using the spectrogram image cross correlation technique. Both the class assignments and the underlying cross correlation coefficients will be displayed in a single table.
• The new command "File/Specials/Join .wav files from playlist..." allows to join the .wav files that are listed in a playlist file (.txt or .m3u) into a single .wav file.
• The spectrogram display procedures have been optimized for Windows Vista.
• Additional option on "Location of measurements" in the Automatic Parameter Measurements tool: "Mean param. of entire element".

Avisoft-RECORDER, version 3.2 (17 August 2007)

• RECORDER USGH now supports the new high-speed UltraSoundGate models 416H, 816H, 1216H and Player116.
• In the single-channel mode, the real-time sprectrogram display now exploits the entire area of the application window (multiple rows).
• The real-time spectrogram display procedures have been optimized for Windows Vista.

Avisoft-RECORDER, version 3.0 (03 May 2007)

• The new Avisoft-RECORDER USGH software now fully supports UltraSoundGate devices in Windows Vista (the previous RECORDER USG software is not compatible to Windows Vista). See the .pdf document USGx16 on Windows Vista.pdf
• The software now uses the standard Windows folders for program files, application data (configuration files and temporary data) and documents (sound files, measurement results, etc.). It is therefore no longer required to run the software with administrator rights.
• The playlist command now also supports common .M3U playlist files.
• The additional syllable duration threshold parameter can help to optimize the automated recording process.
• The new 'Enlarge y axis' parameter improves the real-time spectrogram display on small laptop computers or UMPCs.

Avisoft-SASLab Pro, version 4.39 (23 February 2007)

• Linear Predictive Coding (LPC) analysis options have been added to the spectrogram window ("LPC" option on the Spectrogram Parameters panel) and to the one-dimensional amplitude and power spectrum displays.
• The command File/Specials/'Next file' has been improved (if there are no incrementing numbers in the file names, the next file will be indentified from the file creation date attributes).
• New command "Edit"/"Remove DC Offset"
• The new Spectrogram Export Parameters dialog box option "enable envelope curve amplitude scale" provides a scale bar for the waveform display.
• The previously fixed step display mode of the waveform display in the main window can now be deactivated (option "Analyze"/"Step waveform display mode"). Deactivating this new option will provide a smoother waveform display.
• A new section label import command allows to import section labels (start, end and label text) from common tab-delimited .txt files.
• A few bugs in the classification option of the Automatic Parameter Measurement tool and teh Graphic Synthesizer have been fixed.
• The new option "remove modulation" in the Scaling command of the Graphic Synthesizer now allows to remove AM or FM from re-synthesized playback stimuli more easily.
• A frequency statistics option has been added to the "Scan frequency contour and amplitude envelope..." command.
• The classification commands Analyze/Specials/"Detect and classify waveformevents..." and "Scan for template spectrogram patterns..." have been improved and added to the batch command (Tools/Batch processing). This addition certainly allows to search large numbers of sound files for specific signals (e.g specific calls).
• Three new batch command options have been implemented ("Save one-dimensional transformations into a single ASCII file", "Save mean spectra into a single ASCII file" and "Noise reduction filter").
• New command File/Specials/"Join .wav files..."
• The additional Automatic Parameter Measurements threshold "Reject if peak ampl. < ... dB" enables more reliable results for the parameters "peak freq(minentire)" and "peak freq(maxentire)"
• The Graphic Synthesizer allows to scale single elements individually (by right-clicking at the specific parameter of the element)"
• The channels in multichannel files can now be calibrated individualy.
• The new low-pass option in the spectrogram window command Display/Cut-Off Frequencies... allows to limit the Automatic Parameter Measurements to certain frequency intervals.

Avisoft-RECORDER, version 2.97 (23 February 2007)

• A new trigger option "any channel (OR)" improves the capabilities for simultaneously recording from microphone or hydrophone arrays.
• The newly implemented command 'Monitoring'/'Shut down time...' allows to shut down the computer at a pre-defined time each day. In conjunction with the RTC Alarm option that is avalaible in the BIOS setup of many computers, it is possible to switch on the computer for a limited period of time each day.
• Improved offline .wav file processing capabilities: The new option 'no output - process as fast as possible' that has been added to the 'Device' list box on the 'Out dev...' dialog box accelerates the offline processing of .wav files.
• Playback LOG file implemented.
• Playlist/Autostart option added.
• The NI-DAQmx RECORDER version now supports low-cost digital I/O devices (NI USB-6501) for triggering playbacks (via standard WDM audio interfaces) by external TTL signals.

Avisoft-SASLab Pro, version 4.38 (25 January 2006)

• An additional option on the Automatic Parameter Measurement setup dialog allows to enable the spectrum-based parameters individually for each location. This location-specific parameter selection can improve the clearness of the measurements because it is possible to disable unwanted and irrelevant combinations of parameters and locations.
• The "Derived Parameter" capabilities of the Automatic Parameter Measurement tool have been extended (additional parameter "0").
• A few optimizations in the Automatic Parameter Measurement tool accelerate the processing of very long spectrograms.
• The user will be prompted to save changes before closing a modified file.
• Optional clock time display on the time axis of waveforms and spectrograms (command Analyze/Time axis format/hh:mm:ss.sssss).
• The maximum number of harmonics in the Graphic synthesizer has been expanded to 24.
• Instantaneous frequency and zero-croosing analysis plots (from the One-dimensional transformation command) can now be displayed in the Graphic Synthesizer window as a background graph.
• The Automatic Parameter Measurement matrix results can be copied in transposed order.
• Autocorrelation method (ACF) added for fundamental frequency determination in the Automatic Parameter Measurements tool.

Avisoft-SASLab Pro, version 4.37 (15 July 2005)

• The new "Scan for template spectrogram patterns" command provides a continuous spectrogram cross correlation tool for identifying spectrogram patterns in noisy recordings, where the "Detect and classify waveform" command does not work satisfying.
• The calibration command has been expanded for selectable reference sound levels (1 or 20 µPa).

Avisoft-RECORDER, version 2.96c (16 June 2005)

• The 'time program' trigger has been expanded to 8 independent time programs (user-defined time tables). Each time program now provides up to 6 intervals (increased from 4 to 6).
• Improved LOG file comment facilities (time-stamp mode).

Avisoft-SASLab Pro, version 4.36 (22 March 2005)

Automatic Parameter Measurements :


• The new element separation option "automatic (whistle tracking)" further improves the capabilities for detecting soft rat ultrasonic vocalisations (USV) in noisy environments. See the tutorial for details.
• A second threshold option allows to measue bandwidths at two separate thresholds.
• The option "show threshold" activates a graphic display of the element separation threshold, which improves the transparency of the threshold setting (screen shot).
• Improved and accelerated handling of long spectrograms, new numeric display option (screen shot).

Avisoft-SASLab Pro, version 4.35b (07 March 2005)

• The new 'File Open Settings...' dialog (on the File menu) provides a few options for optimizing the handling of large sound files. Certainly the 'temp directory' edit box allows to select a RAM disk for saving the temporary files. This can significantly accelerate the processing of large sound files. Free RAM disk software is for instance available from www.arsoft-online.de .
• Improved frequency axis grid on the main window display.
• The new command Edit/Append allows to append the clipboard content to the end of the file.
• The sound level display mode on the One-dimensional Transformation panel is now referenced to the RMS level (3 dB lower than the peak level). The new Level Display Mode dialog on the Display menu of the spectrogram window provides various level display options (peak, RMS or spectrum level)

Avisoft-SASLab Pro, version 4.34 (01 February 2005)

• A peak (or dominant) frequency option in the Pulse Train Analysis tool expands the analysis capabilties certainly for frog calls.
• An additional post filter option in the Automatic Parameter Measurements allows to exclude unwanted short and/or broad-band cracks from the analysis.
• The new group analysis option in the Automatic Parameter Measurements tool provides additional measurements on the temporal structure of phrases.
• Impoved capabilities for analyzing the temporal structure of subsequent soundfiles (numbered sound event files created by Avisoft-RECORDER). The new option 'inflate breaks' on File/Specials/'Re-assembling settings...' can speed up the analysis of long sequences (when disabling this option). See the principle of the available file display options.
• The command Edit/'Change volume...' can now either be applied to the current marker or alternatively to all section labels.

Avisoft-RECORDER, version 2.95 (30 December 2004)

• The National Instruments NI-DAQmx driver model has been implemented (executable rec_nimx.exe). This driver supports both M-series and E-series DAQ devices.
• A new 'permanent' trigger mode simplifies the operation of the software for applications that do not require any triggering.
• Multichannel playback capabilities (for soundcards) have been added.
• A "Control Output" option for controlling external devices has been added.
• Configuration file managment commands have been added in order to simplify switching between various parameter settings.

Avisoft-RECORDER, version 2.94 (03 September 2004)

• New .wav file name options (date and time)
• User-defined keyboard shortcuts
• External triggering of playback
• Interactive playback of playlist entries via keyboard shortcuts

Avisoft-SASLab Pro, version 4.33 (05 July 2004)

• Improved command for extracting frequency contours from spectrograms (spectrogram window command Tools/'Scan frequency contour and amplitude envelope'). The new export capabilities enable subsequent statistical analysis of frequency contours (e.g. for comparing signature whistles). See a sample screen shot .
• The new command Tools/Labels/'Label statistics' provides various statistics on labels (including duty cycle versus time)
• A 'Max Spectrum' option is now available from the 'Additional Spectrogram Information' dialog box.

Avisoft-SASLab Pro, version 4.32 (16 June 2004)

• Introducing a new cross-correlation classification command (Tools/Labels/"Classify labeled sections..." and Analyze/Specials/"Detect and classify waveform events...") for automated identification of sound events. The classification algorithm is based on a template spectrogram comparison. See the classification report screen shot.
• A new element separation option in the Automatic Parameter Measurements allows to use separate thresholds for locating the start and the end of an element (which is certainly useful for analyzing bat echolocation calls).
• Export of labels as ASCII-formatted binary time series data.
• Improved handling of the Automatic Parameter Measurements command.
• New Automatic Parameter Measurements option for measuring the locations (time stamps) of minimum and maximum parameters ("Min / Max param. of entire element","t"). See example for measuring the locations of min and max peak frequencies).

Avisoft-SASLab Pro, version 4.31 (27 April 2004)

• A new compressing command (Edit/Compress/Remove silent sections) allows to remove silent sections between sound events (e.g. bat calls) automatically. The reduced amount of data can then accelerate the analysis of large sound files. Similarly, it is now possible to automatically create section labels from sound events (Tools/Labels/Create section labels from waveform events).
• Emulation of frequency division bat detecors for comparing the output signals of time-expansion bat detectrors and frequency division detectors (command File/Specials/Frequency Division Bat Detector Emulation).

UltraSoundGate 116-200 (17 April 2004)

• Introduction of a complete kit for recording ultrasound in air (see USG 116-200 and the UltraSoundGate advertising flyer). The newly designed microphone and the additional polarization voltage supply circuit, that has been added to the UltraSoundGate 116-200, provide superior sound quality for recording bat calls.

Avisoft-SASLab Pro, version 4.3 (22 March 2004)

• The new Pulse Train Analysis command (see example) improves the abilities for the automated analysis of amplitude envelope patterns. Various options help accelerate for instance the temporal analysis of frog calls, grasshopper songs or dolphin clicks. Additionally, simple counting of vocalizations or measuring on-set duration's as required in drug testing is also available. The new command is available from the menu Analysis/'Pulse Train Analysis...'. A batch process (Tools/Batch processing) allows to process several sound files at once.

UltraSoundGate hydrophone accessories (24 January 2004)

• In order to simplify the operation of hydrophones, two dedicated hydrophone interface boxes are now available (see the page on Accessories for Connecting Hydrophones) .
• A specific envelope tracking option has been added to the Avisoft-RECORDER software for acoustically monitoring cetacean echolocation clicks.

UltraSoundGate microphones (30 December 2003)

• Introduction of a new line of externally polarized ultrasound condenser microphones (see the page on Ultrasound microphones). These new microphone options will further enhance the versatility of the UltraSoundGate system.

Avisoft-RECORDER, version 2.9 (14 August 2003)

• 32 bit format option for National Instruments DSA devices (NI 44xx) implemented
  
• Delay option added to the Playlist feature
  
• In the configuration dialog box, a new Copy button allows to copy the settings of one channel to all other active channels
  

Avisoft-SASLab Pro, version 4.23 (01 July 2003)

• New editing commands (Cut & Paste) in the Graphics Synthesizer implemented.
  
• An optional Y axis grid in the main window may speed-up the evaluation of sounds.
  
• A new section label command allows transferring gate function analysis results into section labels.
  
• An additional export parameter option ('hide y axis') in the one-dimensional transformation window adds more flexibily.
  
• New horizontal cursors in the curve window provide enhanced measurement facilities on the One-dimensional transformation displays.
  
• Improved facilities for comparing sound files: A cursor linkage option connects cursors throughout instances of the SASLab software (see example)
  

Avisoft-SASLab Pro, version 4.22 (28 April 2003)

• A color mapping display showing the magnitude in dB has been added to the spectrogram window (see example)
  
• The new spectrogram axis labeling option supports commonly used styles (see example)
  
• Import of 24 bit .wav files (automatic normalization to the internal 16 bit format)
  

Avisoft-RECORDER, version 2.8 (25 February 2003)

• 24 bit recording format added
  
• Extended support for multi-channel soundcards
  

UltraSoundGate re-designed (12 February 2003)

• The UltraSoundGate product family has completely been re-designed for improved performance and additional features (peak level meter; additional sampling rates complying with the audio standard : 96, 192 and 384 kHz; optional phantom feeding (P48) for high-quality condenser microphones; the trigger button is now represented as a standard joystick button)
  
• At the same time, the prices of all UltraSoundGate devices have been reduced dramatically. Further educational discounts are also available
  

Avisoft-SASLab Pro, version 4.2 (09 December 2002)

• Extended functionality for time-delay-of-arrival measurements (TDOA)
  
• New "Magic reticule cursor" mode for measuring sound parameters interactively (see tutorial)
  

Avisoft-RECORDER, version 2.7 (16 August 2002)

• Acoustic monitoring options for high-speed acquistion cards and soundcards allows listening to inaudible ultrasound signals in real-time (heterodyne or aliasing technique)
  
• Real-time frequency measurements can be issued by voice messages through the soundcard (suited for bat surveys)
  
• New playback options for immediate playback (echo) of recorded sounds
  

Avisoft-RECORDER, version 2.61 (19 May 2002)

• Playback option supporting both soundcards and high-speed data acquisition boads (NI E-series, e.g. DAQCard 6062E and Avisoft UltraSoundGate Player)
  
• Play list option for playing several files subsequently
  
• Freeze display command for inspecting the real-time display
  
• "Track peak frequency" option for real-time frequency measurements
  

Avisoft-SASLab Pro, version 4.14 (03 June 2002)

• Improved real-time spectrograph : peak-hold recording level meter, max FFT size increased to 1024, frequency and time measurement cursor and buttons for quicker spectrogram contrast adjustment, the new option "File"/"Save into numbered .wav file and increment" will support quick pre-trigger harddisk recording of sporadic sound events
  
• The main-window recording command now provides real-time spectrogram displays
  
• The filter bandwidth of spectrograms can be set directly from the Spectrogram Parameters dialog
  
• New editing commands: File/Specials/'Insert .wav file', 'Append .wav file', 'Swap channels' and special commands for UltraSoundGate Player
  
• The Automatic Response option is now available in the standard version at no extra costs and a new option supports multichannel experiments
  
• New classification method based on linear discrimination functions (LDA)
  
• The recording buffer of the real-time spectrogram can now be captured by pressing a joystick button
  
• The new option "File"/"Specials"/"Don't work on copies of opened .wav files" will accelerate opening large .wav files.
  

Avisoft-RECORDER, version 2.52 (14 March 2002)

• Optional input from a WAV file for scanning large disk files (this feature may also be used for accelerating the process of finding the best trigger parameter settings)
  
• Frequency and time measurement cursor
  
• Event files are now saved with high-precision time stamps, enabling sample-precise re-assembling of consecutive files in Avisoft-SASLab ProPro.
  
• Maximum spectrogram FFT size is now 1024 points
  
• Optional grid in spectrogram and waveform display
  
• 8-bit mode implemented for high-speed applications with USG 116 and US416
  
• Peak-amplitude display for more precise recording level control
  

Avisoft-SASLab Pro, version 4.0 (26 November 2001)

• Long filename support (up to 256 characters)
  
• The FFT length in One-dimensional transformations, cross-correlations and FFT-filters has been extended from 32k to 2 Gsamples
  
• New eraser cursor mode for improved editing of spectrograms (Tools/Cursors/Standard eraser cursor) and undo facility
  
• New command for removing erased spectrogram structures also from the underlying .wav file (Tools/Remove erased spectrogram sections from waveform). This command will allow you to filter out single disturbance signals or harmonics manually, even if these are inside the frequency range of the signals you are interested in!
  
• Several bugs have been fixed
  

Avisoft-SASLab Pro, version 3.95e (15 October 2001)

• Soundfile compression option for files with large silent sections between vocalizations (e.g. bat echolocation calls) for better handling and easier measuring of temporal parameters (Command 'Edit'/'Compress'). Fast switching between compressed and expanded view (see also the tutorial).
  
• New way to input section labels more quickly by left-clicking plus shift key
  
• New Browse command for comfortable navigation through sound files.
  
• Labels and titles can now be saved directly into .wav files.
  
• Event files created by Avisoft-RECORDER (version 2.4 or later) can be re-assembled into larger continuous files for precise temporal measurements (File/Specials/Re-assembling settings...).
  
• New Automatic Response option (increment RECORDER file number) for event filtering in Avisoft-RECORDER.
  
• New options in the Automatic Parameter Measurements: 'Location of measurements'/'regular intervals of duration / n' and 'Waveform parameters': root mean square, energy, peak-to-peak amplitude.
  
• For more precise Automatic Parameter Measurements in signals with varying amplitudes a new element separation mode with two thresholds has been implemented. For better adjustment, the thresholds can now be modified incrementally by buttons (see also the tutorial).
  
• New option for section labels: Section label grid for more precise temporal investigations
  
• The spectrogram window reticule cursor can now be moved by the arrow keys (To enable this new option, the current configuration must be either reset 'File'/'Configuration'/'Reset' or the appropriate keyboard shortcuts must be defined manually for 'Tools'/'Cursors'/'(Move reticule cursor by one pixel)' .)
  

Avisoft-RECORDER, version 2.3b (19 September 2001)

• Support for the new Avisoft-UltraSoundGate hardware implemented
  
• An additional entropy parameter threshold allows to prevent triggering caused by broad-band disturbance signals (e.g. insect noise when recording bat echolocation calls)
  
• Entering text comments into the LOG files is now possible for documentary purposes
  
• Multichannel streams can optionally be saved into single multichannel .wav files (in order to ensure the phase relationship between channels)
  
• A time program option allows to record (or enable sound-activated recording) according to a pre-defined time table (e.g. for recording each day from 5:00 to 7:30).
  

Avisoft-SASLab Pro, version 3.94c (6 July 2001)

• Support for the new Avisoft-UltraSoundGate hardware implemented
  
• New option in the Automatic Parameter Measurements: 'Delete gaps between detected elements'
  
• Improved spectrogram time axis scaling for very high sample rates (>500 kHz)
  

Avisoft-SASLab Pro, version 3.93d (18 April 2001)

• Main and spectrogram window display during scrolling (pan) improved
  
• Frequency cursors can be added to exported spectrograms
  
• New one-dimensional transformation option for extracting frequency response curves from sine sweep signals
  
• Fundamental frequency output added to the Spectral Characteristics window. The synthesizer Scan spectrogram command now also supports fundamental frequency extraction.
  
• New Import Format option for reading 32 bit floating point format files (e.g. for importing Canary files)
  

Avisoft-SASLab Pro, version 3.92 (12 January 2001)

• User-defined keyboard shortcuts and popup menus for easier access to frequently-used commands (Actions/Keyboard Shortcuts and Popup Menu).
  
• Noise Reduction command for improving noisy recordings (Edit/Filter/Noise Reduction).
  
• Lorenz plot for evaluating temporal patterns of pulse sequences
  
• Entropy option added to the Automatic Parameter Measurements
  
• Avisoft-RECORDER now supports high-speed data acquisition boards by Data Translation. Additionally, a low-cost version of Avisoft-RECORDER for single-channel applications is available now.
  

Avisoft-SASLab Pro, version 3.91 (25 November 2000)

• Fundamental frequency option added to the Automatic Parameter Measurements
  
• An autogain option in the spectrogram display parameter dialog box provides optimal usage of color tables
  
• Avisoft-RECORDER, version 2.0 now supports sampling rates up to 500kHz with various high-speed data acquisition boards (National Instruments, ComputerBoards, ines)
  

Avisoft-SASLab Pro, version 3.9d (23 October 2000)

• The commands Change Volume, Time Domain IIR and FIR filter can now be applied to stereo or multichannel files. Processing of both single channels or all channels of a multichannel file is supported.
  
• Optional axis titles now support more common graphic formats for one-dimensional transformations (see example)
  
• 3D Spectrogram (see example)
  
• 2D and 3D Scatterplots showing the distribution of Automatic Parameter Measurements are now available in order to support choosing class boundaries and exploring dependencies between parameters. (see example)
  
• Optional Automatic Response facility supports automated playback experiments. The event classes determined by the Automatic Parameter Measurements can be connected to pre-recorded .wav files or different echo modes (filter, resynthesis for frequency shift and modulation). (see also)
  
• Real-time classification facility combines the Real-Time Spectrograph with the Automatic Parameter Measurements
  
• New HTML log file format allows to inspect measurements directly from a WEB browser.
  

Avisoft-SASLab Pro, version 3.84 (October 2000)

• A new peak frequency detection algorithm supports measurement precisions beyond the spectrum/spectrogram resolution
  
• Automatic Parameter Measurements extended: sub-element counting for analysis of phrases, measuring the distance from start to maximum, derived element-based parameters for measuring the extend of frequency modulation (upward or downward, rising velocity).
  
• New Save/Load command in the Classification Settings dialog in order to simplify the handling of classification settings.
  
• Avisoft-CORRELATOR now supports aligned averaging of spectrograms previously saved in SASLab Pro from 'File'/'Save spectrogram...'. Averaged spectrograms can be opened in SASLab from 'Analyze'/'Open spectrogram...'
  
• Configuration file handling improved.
  
• New format options for section labels: layer1 | layer2 | layer3 | total, which support hierarchic or overlapped labels.
  
• Label input and editing in the spectrum view
  
• New options 'Actions'/'On program start', which automate some common commands.
  
• Graphic Synthesizer / 'Scan Spectrogram': Accuracy of the fundamental frequency extraction improved, occasional bug fixed, optional static sample point reduction for regular spaced measurements of peak frequency and peak amplitude.
  

Avisoft-SASLab Pro, version 3.83 (September 00)

• Statistics options added to the Automatic Parameter Measurements: minimum, maximum, mean, median, standard deviation and histogram display.
  
• Interactive element separation added to the Automatic Parameter Measurements. Section labels can now be used to measure noisy elements, which can not be recognized automatically.
  
• The results of the automatic element separation can now be used to save the detected elements into separated numbered .wav files and can also be used to automatically create section labels.
  

Avisoft-SASLab Pro, version 3.82 (August 2000)

• Classification facility added to the Automatic Parameter Measurements. This new option may be either used for automatic species recognition or note type classification.
  
• New option in the real-time spectrograph automatic recording facility: Save all events into a single file
  
• Adjustable vertical size of the additional spectrogram information along the time axis
  

Avisoft-SASLab Pro, version 3.81 (July 2000)

• Real-time spectrogram display improved: overlap, y-scale enlargement, down-sampling for low frequency signal analysis, recording level display, overload flag, unlimited streaming into WAV file
  
• Spectrum level scaling for power spectrum display to the One-dimensional Transformation menu added
  
• Zero-crossing analysis option to the One-dimensional Transformation menu added
  
• New "File"/"Shred into numbered files" command for cutting of long sound files.
  
• New "Tools"/"Zoom out time axis" command for better navigation in long and high-resolution spectrograms.
  

Avisoft-SASLab Pro, version 3.8 (April 2000)

• Labeling facility for displaying single point and time section labels (see spectrogram with labels)
  
• High resolution scaling ticks in spectrograms
  
• Title option in waveform and spectrogram output
  
• Graphic editing of amplitude envelope files (.at) and userdefined frequency response files (.flf) in FIR and FFT filters.
  
• Stereo->Mono command improved
  

Avisoft-SASLab Pro, version 3.75 (March 2000)

• Improved Automatic Parameter Measurement (Displacement for Start and Stop locations)
  
• Enhanced resolution of x and y scaling ticks in the curve window
  
• Redo command for repeating of previous commands (menu "Edit"/"Redo")
  
• File properties and statistics function (menu "File"/"File properties...)"
  
• New options for opening WAV files directly from the spectrogram window (menu "WavFile"). Additionally the buttons of the spectrogram window and the entire main window can be hidden in order to save space on the desktop for simultaneous spectrogram display (menu "Display"/"Hide buttons", "Hide main window").
  
• Improved handling of configurations
  

Avisoft-SASLab Pro, version 3.74 (November 1999)

• Curve window export facilities improved (printing of waveforms spread over several lines and pages).
  

Avisoft-SASLab Pro, version 3.73 (October 1999)

• Real time spectrum display implemented (menu option "File"/"Real Time Spectrum...").
  
• Automatic parameter measurement improved.
  
• Reduce image option in the spectrogram window implemented.
  
• Pulse train generator added to the synthesizer module.
  
• Time/Pitch Conversion allows to speed-up and slow-down sounds by none-integer factors without changing the sampling rate.
  

Avisoft-SASLab Pro, version 3.7 (September 1999)

• Automatic parameter measurement facility added (see menu Tools/Automatic parameter measurement setup... in the spectrogram window).
  
• Improved scaling and new options in spectrogram output. (see menu Spectrogram Export Parameters)
  
• Improved marker behaviour in both the main and spectrogram window (marked time sections can now exceed the visible section and will not be removed by scrolling).
  
• Harmonic cursor in the One-dimensional window and new peak detection facility in the Spectral Characteristics window added.
  
• Noise generator added to the synthesizer module.
  

Avisoft-SASLab Pro, version 3.6 (May 1999)

• Real-time display from *.wav file with simultaneous playback implemented.
  
• Energy and RMS calculation from marked waveform sections.
  
• ZooIn and ZoonOut functions added to the main window.
  

Avisoft-SASLab Pro, version 3.5 (November 1998)

• Remote control from Avisoft-RECORDER added.
  
• Support for quick navigating through numbered WAV files generated by Avisoft-RECORDER. (File/Previous File, Next file)
  
• Improved sampling rate conversion (up- and down-sampling to any rate).
  

Avisoft-SASLab Pro, version 3.4e (September 1998)

• Gate function for the analysis of temporal patterns implemented (One-dimensional Transformation).
  
• New option in batch processing: Save ASCII/Binary spectrogram.
  

Avisoft-SASLab Pro, version 3.4 (March 1998)

• Enhanced resolution of envelope plots in printed spectrograms.
  
• New sound file formats for reading and writing: NeXT/SUN (*.AU/*SND), Apple (*.AIF/*.SND).
  
• 'Scan Spectrogram' function in the Graphic Synthesizer allows resynthesis of spectrograms.
  
• Time and Frequency parameters in the Graphic Synthesizer can be scaled independently using the new 'Time and Frequency Scaling' option.
  

Avisoft-SASLab Pro, version 3.3 (January 1998)

• Print option in the curve window implemented.
  
• The appearance of exported curve window graphs can be influenced.
  
• Problems in loading of some *.WAV file versions solved.
  
• Conversion between 8- and 16-bit sound file formats
  

Avisoft-SASLab Pro, version 3.2 (December 1997)

• Improved printing: Very large spectrograms can be printed on several pages, absolute spectrogram size is adjustable in millimeters, the frequency range displayed on the spectrogram can be adjusted, optional signature, bug (occasional crashes after printing) fixed.
  
• Batch processing supports printing and saving of spectrograms, filtering of sound files and saving of One-dimensional transformations.
  

Avisoft-SASLab Pro, version 3.1 (November 1997)

• Automatic Recording: Each time a predefined threshold is exceeded within a certain frequency range a new *.WAV file is generated and the signals will be saved onto the harddisk for a selectable hold-time. This mode of operation is useful for long term monitoring.
  
• Normalizing of waveforms in order to generate comparable spectrograms from recordings made with different recording levels.
  
• Trim function supports quick removal of undesired parts from the WAV file.
  

Avisoft-SASLab Pro, version 3.0 (June 1997)

• Real-time spectrogram scroll mode implemented
  
• Manual Erase-mode in the spectrogram window. This allows to remove undesired structures from the spectrogram image.
  
• Harmonic cursor in the spectrogram window. This supports the determination of the harmonic structure (fundamental frequency) of the spectrogram.
  
• Enhanced amplitude manipulation (tapering, limiting, multiplying and dividing by files).
  
• Manual sample point editing in the main window. Editing (cut, paste, ...) can be done more accurate.
  
• Graphical input of cutoff-frequencies in the filter dialogues from the spectrogram or spectrum display using cursors. This improves the usability of the filter functions.
  
• Undo of editing actions
  
• Synthesizer: Generation of harmonic signals by mouse drawing of the parameter evolution (fundamental frequency, amplitudes of harmonics, frequency and amplitude modulation)

Avisoft-SASLab Pro, version 2.75 (January 1997)

• Memory allocation bug in Real-time display and Print function fixed
  
• Bug in the userdefined file-import function of 10-, 12- and 14-bit binary data in offset format fixed.

Avisoft-SASLab Pro, version 2.74

• Bug in "Save ASCII-Spectrogram" function fixed (caused an error in the Correlator module)

Avisoft-SASLab Pro, version 2.73

• New FFT-windows: KaiserBessel and Gauss
  
• FFT-window and Selectivity preview in the Spectrogram-Parameter dialogue

Avisoft-SASLab Pro, version 2.6

• FIR filter implemented
  
• Two-channel Real-time spectrogram display and stereo display in the main window introduced

Avisoft-SASLab Pro, version 1.0 (December 1993)

Avisoft-SASLab Light, version 1.0 (June 1993)

Avisoft-SONAGRAPH for DOS, (May 1990)