Main characteristics of VA:

VA is a real-time program that simulates a range of electronic instruments, including:

• 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;

• 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, true RMS, peak to peak and mean display plus resolution calculus; 

• Filtering (low pass, hi pass, band pass, band reject, notch, "diode", DC removal, graphic equalizer;

• 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;

• 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 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;

• Unlimited frequency sampling (depend from the capabilities of your soundcard/acquisition device);

• 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;

• 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);

• Wave/flac/mp3 file recording and playback;

• Internal input;

• Custom FIR filters;

• Graphic equalizer;

• Acquires audio samples from other applications;

• Tool for automatic computation of frequency response of device (amplifier, louspeaker etc. for now only two simple methods, but soon MLS and ESS);

• Automatic Check for new version of VA (main menu, help item).

See the Product details section for more details or here for a brief introduction.

ROGA-Instruments Roga adopted Visual Analyser as a basic tool for its products for several years (example ROGAdaq2).

Contact Information

Electronic mail

General Information: alfredo[at]accattatis.org