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Home > News and Revision History > Avisoft SASLab Pro, version 5.3.2 (28 March 2025)

Avisoft SASLab Pro, version 5.3.2 (28 March 2025)

  • The FIR filter tool has got a gain option (apply digital gain) for balancing signal level drops caused by user-defined frequency response compensation filters and the FIR filter algorithm has been optimized, which excelerates FIR filter operations by about 50%.
  • The frequency response editing functionality (Edit > Filter > Time Domain FIR Filter > User-defined > Edit) has been improved. Frequency responses can now be viewed and edited in logarithmic dB units by activating the new Curve window option Display > logarithmic Frequency Response display and a few navigation commands (pan, zoom, unzoom, and display range) have been added (see Curve window > Display). The newly added editing commands Subtract another Frequency Response…, Smooth Frequency Response and Resample Frequency Response can help preparing frequency response compensation filters (see Curve window > Edit).
  • The thresholds for measuring minimum/maximum frequencies and bandwidth on the Automatic Parameter Measurements tool can now be defined in absolute units when the newly added abs option is activated.
  • The single threshold element separation method has got a max freq. change option for segmenting bird song notes that are separated by freqeuncy jumps rather than silent breaks, such as found in cowbirds (Element Separation).
  • The minimum .wav file duration required for SMPTE time code decoding has been reduced from 1.1 seconds to 80 milliseconds (2 video frames).
  • The main window drop-down menu command Edit > Synthesizer > Insert time code / pulse train / single pulse / ramp… has got an amplitude field to customize the amplitude of the generated waveforms and a filter option to reduce ringing when the generated square wave signals are being filtered.
  • To further improve the measurement capablities, an amplitude cursor and a crosshair measurement cursor have been implemented on the main window. See Analyze > Measurement mouse cursor and a screenshot. On the spectrogram windows is now also possible to measure sound levels on the waveform display (screenshot)
  • The display options for the UltraSoundGate DIO track have been extended. The new drop-down menu option UltraSoundGate DIO display style > allows choosing different line widths and an alternative gray background color of the waveform display.
  • The main window command Edit > Format > Stereo -> mono / Mix… has got an automix option that allows to improve the signal-to-noise ratio in multi-microphone setups.
  • The command Analyze > One-dimensional transformation > Frequency response, sine sweep mono now allows to save frequency response .flf files and the curve window command Edit > Normalize Shape has been added to better support creating equalizing FIR filters.
  • The main window command File > Specials > Create multichanel file… has got a new button for creating combined filenames (Combine filenames!).
  • The batch command Pulse Train Analysis adds logging the Overall Measurements into the logfile Pulse Train Analysis.txt.
  • The new main window command File > Specials > Create multichanel file… simplifies the generation of multichannel .wav files that are needed for the UltraSoundGate Player 216H and 416H devices.
  • The new main and spectrogram window command Tools > Labels > Rename labels… can accelerate annotating vocalizations by clicking buttons of predefined text modules.
  • The Automatic Parameter Measurements tool can now measure the sinuosity and curvature of elements (see Location of measurements – more…).
  • The maximum number of threads for spectrogram calculation (Analyze > Spectrogram Parameters > Threads) has been increased to 24 (taking advantage of the capabilities of new multi-core CPU models). An occasional issue of the multithreading option in long spectrograms (Threads > 1) on some computers has been fixed.
  • Both the main and spectrogram window editing tools now support unlimited undo levels (main window command Edit > Undo and spectrogram window command Tools > Undo last modification).
  • The sum and mean parameters of the Time derivative of entire element toolset can now be combined with the use absolute values and calculate slope (kHz/ms) options, which allows to quantify the average frequency modulation of elements (expressed in kHz/ms).
  • The spectrogram window commands Tools > Automatic Parameter Measurements > Move to previous/next element can now also be accessed through buttons (see screenshot).