http://www.bonisaudio.com/soft_zerodbv.html
{ ZERO DBV • V 1.0 • REFERENCE 0 DBV FOR REALTEK AUDIO CHIPSET }
0 DBV Sine Generator @ 100 Hz, 1 KHz and 10 KHz. Tested with Realtek audio chipset. This code sometimes also work with different audio chipset @ 1 Vrms but you need to verify your soundcard output with a true rms multimeter (1 Vrms)
{ ZERO DBV • V 1.0 • REFERENCE 0 DBV FOR REALTEK AUDIO CHIPSET }
0 DBV Sine Generator @ 100 Hz, 1 KHz and 10 KHz. Tested with Realtek audio chipset. This code sometimes also work with different audio chipset @ 1 Vrms but you need to verify your soundcard output with a true rms multimeter (1 Vrms)