At a recent week long Keyboard Festival in the UK I spent a little time with one of the Yamaha demonstrators and he gave me a few tips about how they set for demonstration purposes to get the best out of the board by setting up the effects on the voices. This is a general setting they use most of the time with most of the voices for demonstration purposes. He was discussing the 9000 & 9000PRO.

Mixer Page. Effect Type, set HALL 3 on all 3 Right Hand Voices.
Effects Setting. Reverb set to Zero. DSP set to between 40 to 45.
The reason the Reverb is Zero so it does not interact with the DSP settings. To use the Reverb as well will crowd the DSP effect.
I have spent a bit of time trying these setting and I feel that on Brass, Saxes Trumpet . Guitars etc: there is an improvement in vibrancy
(if that's the word). Thought Yamaha owners might be interested.

Graham UK