FWIW, While I don't have one of those 'incredible rigs' you refer to, I find it more a mood/music thing than the changes in the actual sonics of the system (apart from listening during warm up or if you have bad incoming juice, during the middle of the day), my systems sound is constant. But if I don't fit the piece to the mood it can be a real turn off.
Trying to enjoy a complex classical piece which requires attention, or some really up beat jazz, too early or late in the day can be a real turn off. It just doesn't sound 'musical' just sort of a lot of noise. This can be especially irritating when you know you love the music, so you tend to feel that your audio system is failing you.
This is not to say that sound cannot change due to atmospheric conditions, especially humidity, and as I mentioned the quality of your electricity (excessive RFI for example). This can make a difference but I've found if I really select a piece that matches my mood I can easily listen thru the sonics.
Trying to enjoy a complex classical piece which requires attention, or some really up beat jazz, too early or late in the day can be a real turn off. It just doesn't sound 'musical' just sort of a lot of noise. This can be especially irritating when you know you love the music, so you tend to feel that your audio system is failing you.
This is not to say that sound cannot change due to atmospheric conditions, especially humidity, and as I mentioned the quality of your electricity (excessive RFI for example). This can make a difference but I've found if I really select a piece that matches my mood I can easily listen thru the sonics.