The are both dual channel FFT measurement software used to test audio systems. If you ever go to a large scale live production, you'll likely find one of them running. Usually sound engineers use them in single channel RTA mode because it looks impressive to the layperson to see all the little frequencies bouncing up and down. More importantly, they are used to measure impulse, phase, and frequency response of a system so they can be properly time aligned and tuned. Normally you'd compare the reference signal (pink noise usually) to the measurement microphone. In my case, I need to also measure the filter networks of passive cross-overs among other such tests. Its not a simple matter of using a LCR and ESR meter to test coils and caps. I have tested this pad and it works great -but- im an audio engineer, not and electrical engineer and wanted to know if there's a better way to pad down tens of watts down to a balanced mic/line level xlr input.I have no idea what they are ... have you a link please
