I think when using the Esoteric el natural org and DF setting much like the SACD when played you are hearing the quality of the DAC's in this unit without manipulating the information off the disc. These units have superb DAC's. I listened to Sinatra this morning, went through all the filter setting that I like and have used, enjoyed a few of them, but every time I went back to el natural setting, Sinatra sounded like a real person singing in front of me, tone of his voice was spot on, his phasing was better, more depth and tone color that makes the reproduction was as real as a system can sound besides live of course. High Hope you could hear the hall Frank was in and the tone of the kids were perfect, use the setting, some areas came more forward, Sinatra's voice got bigger, Bass got fatter, so more hi-fi'ish, back to el natural and everything feel into place how a recording should sound, a balance to it all and much more firmer and detailed bass by far. I must say though I do you a BNC, Digital terminators and Cardas RCA caps for the unused RCA outs on my player, by doing so the noise level drops to such a extent, that your jaw will drop, these small tweaks are well know for any digital sourse, don't use them terminate them. Cost $25.00. I am enjoying my system more and more now. When you start grabbing recordings to replay you know you and found something special.