I have limited knowledge of computers. Downloaded True RTA, a free program, but limited. It works, and was able to even out response. My problem is the laptop, Dell inspiron 5000 W/98 has a built in microphone. I used a mono mini jack into the side w/ balanced transformer for the pro AKG mic to unbal into the computer. Watched it work with pink noise from a cd I have and made some corrections to the audio system. Then I find out that the internal mic of the computer still is working at the same time as my ext. mic. The mini plug I put in was mono,, tried a stereo mini not connected to anything into the side of the computer and the internal mic still was active. How do I stop internal mic? no hammer solutions please. Thanks.