If Yamaha is listening, I’d like to see some improvements to the vocal harmony section on the SX900. Aside from an XLR input, which would be nice for sure, working with the presets should be somewhat easier. For example, many of the harmony choices are saturated with too much reverb for my tastes. So, I adjust everything accordingly for a particular present and it works fine. Now, to audition other presets, all parameters jump back to their default settings when activated. I’d like to try various harmony presets with my reverb and delay settings holding in place. Maybe it can be done and I’m missing something.