I'm visual too, so I can relate. But also for simpler matters. I have the Zadar, which outputs 0-10V (attenuatable). Suppose I get that down to 0-3V. Now if I invert that, I get -3-0V. Say I want it to be 0-3V. With many DC sources, it's hard to say if I'm really getting 3V. I was using that to AND the inverse of envelope of a sound with gates, in other words to stop gates from triggering while the sound is still playing. By ear, it's probably good enough. Visually, I feel it's more accurate. Now the question is - do I want to spend €500 on a Mordax for that?
-- Arrandan
Well I would just say that 1) there are cheaper scope options out there than the Mordax, which has 4 channels and does more than just act as an oscilloscope. Plum Audio, FPB, and Intellijel have cheaper scopes, and there may be others I'm missing as well. And 2) If your experience is like mine you're likely to run into other situations where you'll be glad you had a scope. I actually have more than one and I don't regret it at all.