Humidity most certainly affects the tonality of a pipe organ.
So persistently does the human ear rebel against the division of the tetrachord into two greater tones and a leimma or hemitone, as represented by the fractions 9, 9, 26, that, centuries before the possibility of reconciling the demands of the ear with those of exact science was satisfactorily demonstrated, the Aristoxenian school advocated the use of an empirical scale, sounding pleasant to the sense, in preference to an unpleasing tonality founded upon immutable proportions.
These scales were not, as is vulgarly supposed, wholly abolished in favour of our modern tonality in the 17th century.
The tonality is confident not boastful, intelligent but not parental, playful and in plain English.
I heard greater dynamic contrast, a larger and more cohesive soundstage, and a clearer, more realistic rendering of tonality.