Avisoft SASLab Pro Animal Bioacoustics Analysis Software

Overview

Avisoft SASLab Pro is a professional-grade bioacoustic analysis platform engineered for rigorous quantitative analysis of animal vocalizations across the audible and ultrasonic spectrum (up to 250 kHz with compatible hardware). Built on a deterministic real-time signal processing architecture, it implements core acoustic measurement principles including fast Fourier transform (FFT)-based spectral decomposition, Hilbert-transform-derived envelope and instantaneous frequency estimation, linear predictive coding (LPC) for vocal tract modeling, and cross-correlation-based pattern matching. Designed explicitly for field biologists, ethologists, conservation researchers, and auditory neuroscientists, SASLab Pro supports hypothesis-driven experimental workflows—from single-call parameter extraction to large-scale comparative phonetic mapping—while maintaining full traceability of processing steps and calibration metadata.

Key Features

• Real-time spectrogram visualization with configurable FFT sizes (64–1024 points), true-color intensity scaling, and TrueType font–enabled publication-quality export (TIFF, PNG, EPS)
• Circular buffer recording synchronized with live spectrographic display for uninterrupted long-duration monitoring
• Digital filtering suite: FIR/IIR bandpass, notch, high-pass, and low-pass filters with adjustable roll-off and phase-linear options
• Interactive measurement cursors supporting dynamic parameter tracking—including fundamental frequency (F0), harmonic spacing, amplitude envelope, modulation depth, and temporal onset/offset
• Automated event detection engine with user-definable thresholds for amplitude, entropy, zero-crossing rate, and spectral centroid deviation
• Comprehensive parametric analysis module: RMS amplitude, octave/1/3-octave band energy distribution, pulse density histograms, cepstrum, autocorrelation, cross-correlation, and spectrogram similarity matrices
• Heterodyne playback mode for real-time down-conversion of ultrasonic bat or rodent calls into audible range
• Integrated sound synthesis engine enabling manual or script-driven reconstruction of vocal elements via time-frequency trajectory drawing (e.g., pitch glide, amplitude modulation)
• Template-matching classifier using normalized cross-correlation between spectrogram segments and reference patterns for syllable-level taxonomic assignment
• Dedicated pulse train analyzer for quantifying inter-pulse intervals, burst duration, duty cycle, and periodicity statistics in echolocation or communication sequences
• Georeferencing capability: automatic embedding of GPS trajectory logs (NMEA format) into WAV headers; generation of species-distribution maps compatible with ESRI Shapefile, KML, and GeoJSON standards
• SMPTE/LANC timecode synchronization for multimodal experiments integrating audio, video, and sensor streams
• Extensible metadata framework compliant with Darwin Core and Audiomoth-compatible XML schemas; supports custom field definitions and relational querying across datasets
• Batch processing pipeline with scripting interface (VBScript, JScript) for automated preprocessing, segmentation, feature extraction, and report generation

Sample Compatibility & Compliance

SASLab Pro accepts industry-standard PCM WAV files (16-/24-/32-bit, mono/stereo, sample rates up to 500 kHz when used with Avisoft’s UltraSoundGate hardware). It fully supports recordings from diverse acquisition systems—including Pettersson, Binary Acoustic Technology, Wildlife Acoustics, and custom-built ultrasonic microphones—provided metadata and calibration coefficients are embedded per IEC 61260-1:2014 Class 1 specifications. The software architecture aligns with analytical validation requirements outlined in ISO/IEC 17025 for accredited laboratories and facilitates GLP-compliant documentation through timestamped audit logs, user authentication, and version-controlled processing protocols. Optional configurations enable 21 CFR Part 11 compliance for regulated preclinical auditory studies.

Software & Data Management

Data integrity is enforced via hierarchical project structures: raw recordings reside in immutable archives while processed derivatives are stored with provenance tags indicating applied filters, window functions, and normalization methods. The embedded virtual database stores all annotations, measurements, and taxonomy assignments in searchable XML records, enabling complex queries (e.g., “all Myotis lucifugus calls >15 kHz recorded within 500 m of water bodies between April–June”). Export formats include CSV (for statistical packages such as R or Python/Pandas), MATLAB .mat, and standardized bioacoustic exchange formats like Raven Selection Table and Acoustic Workbench .awb. Integration with GIS platforms (QGIS, ArcGIS Pro, Google Earth Pro) is native via KML export with embedded spectrogram thumbnails and temporal metadata.

Applications

• Species identification and biodiversity monitoring in passive acoustic surveys
• Ontogenetic studies of vocal development in songbirds and marine mammals
• Neuroethological investigations of sensorimotor integration during vocal production
• Conservation impact assessment: quantifying anthropogenic noise interference on communication space
• Comparative phonetics across taxa using multivariate morphospace analysis of spectral-temporal features
• Field validation of machine learning classifiers trained on annotated corpora
• Acoustic niche partitioning analysis in sympatric bat communities
• Playback experiment design and response quantification (latency, call type switching, approach behavior)

FAQ

Is SASLab Pro compatible with macOS or Linux?
No. SASLab Pro is a native Windows application requiring Microsoft .NET Framework 4.8 and is validated exclusively on Windows Vista through Windows 10 (64-bit recommended). Virtualization or emulation is not supported for real-time analysis or hardware synchronization.
Does the software include built-in recording hardware drivers?
SASLab Pro includes optimized drivers only for Avisoft’s UltraSoundGate series interfaces. Third-party audio devices require ASIO or WDM drivers installed separately; compatibility depends on vendor-provided latency and clock stability specifications.
Can I automate repetitive analysis tasks?
Yes. The Batch Processor supports scripting via VBScript and JScript, enabling fully unattended execution of segmentation, feature extraction, classification, and report generation across thousands of files.
How is calibration handled for absolute sound pressure level (SPL) measurements?
SASLab Pro does not perform SPL calibration internally. Users must apply manufacturer-provided sensitivity values (e.g., mV/Pa) and preamplifier gain settings manually during import or via batch metadata injection to derive calibrated dB SPL values.
Is technical support available internationally?
Yes. Avisoft provides direct email and remote desktop support in English, German, and French, with response SLAs defined per commercial license tier. On-site training and method validation consulting are available upon request.