In message , igorp@USA.NET writes >I need very urgent to do a signal generator from SB 16 card. All my attempts to > find some program failed. I am short of time to write a program by myself. Does > anyone know a source for downloading a program that generate a sinusoidal > signal from 300 to 4000 Hz in output of Sounblaster card? Look for a sound editor program called Goldwave. It should be on the Simtel archive. You can input your own function as a mathematical expression, and it will use it to generate the waveform. I often use it to generate tones at various frequencies. Leon -- Leon Heller, G1HSM leon@lfheller.demon.co.uk Tel: +44 (0) 118 947 1424 (home) +44 (0) 1344 385556 (work)