I really enjoy using the built-in sounds on my PX-S3000, but there are times when I want to use it as a MIDI controller too. I'd like to have the flexibility to play only built-in sounds, only external sounds (VSTs), or a combination of the two. I thought about maybe saving some registrations with different MIDI setups so I can quickly change. Are the MIDI settings on the keyboard global or can different MIDI setups be saved with each registration? Also, is there any way to turn off MIDI out on the keyboard? Thanks.