I'll also add that that, while the PSR-E433 is superior to the old PSR-520 in many respects, the 520 does have a nice DSP feature. On the YouTube recording, you can hear the DSP with the phaser on the background strings sound, as well as the distortion on the electric guitar sound in the middle of the song. I feel I got pretty close with the E433, but not quite. But of course, most of the other sounds are, in my opinion, better on the E433, with many more options for editing/customizing. This would probably sound even better on an E453 or E463, since those keyboards do include the phaser and distortion DSP effects.