this is a good discussion. I owned the yamaha PSR8000 years ago and the sequencer on that was termed a "song player". I dont think yamaha at the time themselves dared to call it a sequencer. I used it though as a workstation and found angles on getting the best out of the song palyer function that even yamaha had not thought could be done. I had an interesting discussion with one of the product managers on the Motifator forum about the Motif XS and how it was a workstation and how the yamaha arrangers could not do similar functions and i had to correct him many times. But thats another discussion however although the song player features on the Tyros 2 and 3 are virtually still the same as the PSR8000 they now call it a sequencer !! Go figure !! its all good marketing fun :-)