Hi all. Just beginning my research of keyboards for purchase of a new keyboard (haven't had one in 30 years). I'm interested in the wk 7600 or ctk 7200, but haven't found any comprehensive demo/tutorial videos on these models, and especially ones that the sound is output to an amp/amps, or recorded as wave. I find the videos done using the built in speakers can't possibly be doing these units justice. Can anyone point me to a link/s for more representative videos on these models capabilities? Has Mike Martin done a clinic on these models yet, or is one planned, if not done yet? Thanks in advance for any help.