FFT Spectrum Analyzer Freeware

FFT Spectrum Analyzer Freeware


Visual Analyser 2019



Recommended Hardware


Digital IEPE USB Sensor Interface


  • Plug.n.DAQ Lite
  • RogaDAQ2

    Visual FFT Analyzer 2019 Description


    Visual Analyser is a complete professional real time software, transform your PC in a full set of measurement instruments

    free spectrum analyzer software


    No new hardware necessary (you can use the Sound Card of your PC) or you can use a specific external hardware for example Plug.n.DAQ Lite or RogaDAQ2.


    Visual Analyser runs on Windows 9x,ME,2k,XP,NT,Server,Vista,7,8/10. Visual Analyser 2019 version now available (for 64 and 32 bit platform), no longer compatible with Windows 9x.


    The 2011-2012 version runs on Linux by means of wine utility. WAVE file management added in 2012 version and further improved in 2012, 2014 and 2019 version.


    VA is a real time program which simulates a set of electronic instruments, such as:


    • Oscilloscope (dual channel, xy, time division, trigger);
    • Spectrum Analyzer with amplitude and phase display (linear, log, lines, bar, octaves band analysis 1/3, 1/6, 1/9, 1/12, 1/24);
    • Wave-form generator with "custom functions", triangular, square, sinusoidal (all with NO ALIASING and smooth transition), white/pink noise, pulse generation, DC generation[New!];
    • Frequency meter (in time and frequency domain) and counter; in time domain by means of a real time zero crossing algorithm;
    • Volt meter with DC[New!], true RMS, peak to peak and mean display plus resolution calculus;
    • Filtering (low pass, hi pass, band pass, band reject, notch, "diode", DC removal);
    • Memo windows (data log) for analysis and storage of time series, spectrum and phase with "triggering" events; THD and Impedance data logging with spline interpolation; possibility to save the graphics in various format (.tee, .txt, .wmf) )and display them with an internal viewer[New!];
    • Screenshot of Spectrum and Scope window;
    • A TRUE software digital analog conversion (for complete signal reconstruction using Nyquist theorem);
    • Frequency compensation: possibility to create/edit a custom frequency response and add it to the spectrum analyzer computed spectrum; added standard weighting curves A,B,C [New!]in parallel with custom frequency response;
    • Support for 8/16/24 bit soundcard by means of API calls;
    • Internal 80 bit IEEE floating point variables for minimum rounding error;
    • Cepstrum analysis;
    • Cross Correlation;
    • Extended THD measurements, with automatic sweep, compensation, data log;
    • ZRLC-meter with Vector scope, automatic sweep in time and frequency for automatic measurement;[New!]
    • Calibration mechanism (you can calibrate the VA scales directly in VOLT or dB or percent full scale) ;
    • Set of values computed in real time (peak to peak, peak, crest factor, form factor, true rms, mean, frequency with zero-crossing algorithm).[New!]
    • Wave file recording and playback
    • Internal input
    • Custom FIR filters