Multi-Instrument is a powerful sound card based multi-function virtual instrument software. It contains Oscilloscope, Digital Filter, Spectrum Analyzer, Correlation Analyzer, Dynamic Signal Analyzer, Octave Analyzer, Distortion Analyzer, Multimeter, SPL Meter, Frequency Counter, Counter, RPM Meter, Signal Generator (Function/Arbitrary/Noise/Sweep/Burst), Waterfall Plot, Spectrogram, Data Logger, LCR Meter, User Configurable Device Test Plan.