I just purchased the NX5R and I'm utterly confused. I'm not familiar with Korg products and the interface is much different than the brand I'm used to, being Yamaha. How do I access the sounds off of the daughter board? It has an XG mode, but I do not know how to get there. I have Yamaha sequencers, if that is any help. Can I access the expansion tone generator with my MIDI controller ( that happens not to be an XG compatible unit )? Thank you.