I want to measure for ex a battery 0.7V dc using a program like Visual Analyser/Soundtrack Oscilloscope/jDTF/Scope/xoscope. I connect the negative pole of the battery to sleeve and the pozitive to ring
But I dont see any changes on soundtrack oscilloscope. I tested it with microphone on the same plug in and it was respondign to my voice, but when I plug in the dc voltage nothing is changed, there is only noise. Do you know what am I doing wrong?