VIRTINS Sound Card Signal Generator is a powerful PC based virtual instrument. It consists of a sound card based Signal Generator and an off-line Oscilloscope. 1. The dual channel Signal Generator (Sweep/Arbitrary/Function Generator) provides the following types of waveform for output: (1) Sine (2) Square (3) Triangle (4) Saw Tooth (5) White Noise (6) Pink Noise (7) Multi-tones (8) Arbitrary via user-configurable waveform library (9) MLS (10) Muscial Scale (11) DTMF (12) Burst at either a fixed frequency, or a frequency that sweeps linearly or logarithmically within specified frequency range and time duration. 2. The dual-channel off-line Oscilloscope provides four types of views: (1)Waveform display of Channel A and Channel B (2)Waveform display of Channel A + Channel B (3)Waveform display of Channel A - Channel B (4)Lissajous Pattern display for Channel A and Channel B The off-line Oscilloscope can be used to view the signal generated by the Signal Generator. It can also be used to view the WAV files recorded by other sound recording software.