Acoustics
There is a reverb in the larger areas, Tim, but no staccato echoes. I have problems in some restaurants, when low ceilings and bare floors create quite a din, but we never had that problem, even when we have a large dinner. The ceilings are fairly high on the ground floor, and there is air space between the ceiling and the floor above. The library and living room ceilings are two story’s high. I think those, the dimensions (no multiples, I think), and the large spaces contribute to the damping of sound, which is never obtrusive.
A cousin who plays jazz guitar jammed with a female singer one time in the living room. Their sound was very clear and surprisingly carried throughout the house. The reverb was just right. A rock band will be another story, though!
The upper floor remains quite bare, as shown in these photos of two bedrooms, but are quiet, too.
There are no intrusive echoes, but, if you clap your hands in the reading area shown below, you will hear a reverb as in a large chapel.
The absence of things makes the house easy to maintain and has a calming effect, noticed immediately by most friends. The difficulty, as you noted, is keeping stuff from creeping in. It’s not easy.
Good luck again!
Andy