Well, twoleftears, something must be wrong with my system. I get no sound beyond the boundaries of my speakers, but then I don’t expect any. You can revisit what I had to say about set up in RV’s other post on imaging wherein I talk about the ’stereo construct’. Only out of phase information can appear there, but side wall reflections are often mis- heard as primary signals. Nothing wrong with setting up your system to get that sound if that is what you really want.
About the recording itself, it is a 1979 DG after all. Not overly warm or romantic. I love the clarity of his and the orchestra in these pieces, as compared to, lets say my old favorite (on LP’s) Claudio Arrau. Neither the piano nor the orchestra dominate. I find the sound balance with the piano on left center of the stage. FWIW I have quite a few of these works but this is the only one I listen to any longer. I understand that he did a redo in 1999 of these works wherein he conducted from the piano with a Polish Orchestra which is highly regarded. These are apparently highly regarded as well even if quite different.
I’m no expert on these pieces. Perhaps RV would like to comment.