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 calculation

• 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)

• 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

• 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 file recording and playback

• Custom FIR filters