DGenR8's sig caught my attention and in my attempt to make sense of what doesn't, I found this stuff:
"This entire song is a reference to the Lumpy Gravy recording sessions. For the un- or half-informed: In the Lumpy Gravy sessions numerous people were closely gathered around a grand piano to speak on many subjects of significance and insignificance. At the same time a large weight was set on the piano's sustain pedal so that it was always depressed. This has the effect of setting up a very spacey and ambient resonance as the piano strings vibrate sympathetically with the sound waves created by the persons speaking. Since all of the strings of the piano are vibrating, the musical effect can be referred to as pan-chromatic (that is, all chromatic tones are heard). Another musical use of pan-<music-word> is 'Pan-Diatonicism'. This is what you'd get if you went and slammed your forearms across only the white keys of the piano - one could say that the noise that came out was 'Pan-Diatonic'."
Robert Moore (evilbob@tbag.tscs.com)
Taken from: NOTES AND COMMENTS - the free opinions appendix to the alt.fan.frank-zappa newsgroup FAQ ver.2.15 part 3 of 4 - Put together by Vladimir Sovetov (sova@kpbank.kemerovo.su)
"Pedal-depressed pan-chromatic resonance and other highly ambient domains" is liklely a musical/acoustic/humorous reference to the style
in which both the piano and vocals are played, processed and recorded on the piece, "Evelyn...".
I beleive the piece was a composed on a pretty impromptu basis:
From a pianistic point of view, the piano part is hysterical, as it paralles Zappa's vocals around the chordal changes.
(The PEDAL is DEPRESSED, the chords are moving in a PAN- CHROMATIC pattern...)
The close mic-ing technique used produced interesting RESONANCE with the vocal and sound board - I wouldn't doubt that he's singing 'in the piano' (as Pigs and Ponies type stuff on Lumpy Gravy - or trying to get that effect' through sound processing in the studio.
The result is a highly AMBIENT DOMAIN for the sound on that piece - the ambient (processed) 'space' on that track is really cool.
"A curious breeze, a garlic breath, which sounded like a snore - somewhere from the Steinway or even from within..." is an obvious reference to this close mic-ing of vocals at the piano stool...
In this case, I beleive that Zappa is documenting a very cool improvisationsal or micro-composition while at the piano stool in his UMRK.
Note: Maybe that takes the fun out of it though.