Audio Frequency Sinusoidal Signal Generator is intended for adjusting and measuring parameters of audio equipment. Works with 16, 24 and 32 bit sound cards at sampling rate up to 384 kHz. Independent channels frequency and amplitude controls. Adjustable phase shift between channels. A step of frequency setting is 0.0001 %; level - 0.1 dB; phase - 0.1 degree. The minimum coefficient of nonlinear and intermodulation distortion is limited only to quality of a used sound card. The Sweep Frequency Mode with adjustable rate in linear or logarithmic scale.