Have you ever been working on your mix and a certain element just won't fit? Despite your best efforts, with gain staging, EQ, compression, phase-correction, or other effects, a certain sound falls out of the mix. What's the best course of action when all else fails? The answer is simple, change the element(s) that is/are causing the problem. One cleaver function in Ableton makes changing a given sound for another almost painless, "Hotswap."