If your serious start looking at something like these. Your sound card and that program are probably not that accurate with limited frequency range. . These listed below ( except fscan ) also have carrier wave options for better penetration. They are the premium pad type devices. Also run a wire from the positive lead to a foot bath with Epsom Salts for better penetration, be careful not to turn it up to high if you have no protection from shock. If your unit fails you could also possibly get 110 volts!