NCH Sound Tone Generator lets you create audio tones, sweeps or noise waveforms using a Windows computer with a sound card. Typical Applications include test tone generation in studios for the alignment of levels, calibration and testing of audio equipment or speakers, tuning music instruments as an accurate reference tone, demonstration of audio principles to students and more.

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.