"The last album was the first one that I would actually hand over to people with a smile," she says, almost seeming to imply that it was the first one she was actually pleased with, "and that was followed by a greater period of non-creativity, when I just couldn't write properly at all.
"It happened before, when the tour was over, and then I felt I'd just given so much out that I was like a drained battery, very physically and tired and also a bit depressed.
"This time it was worse; a sort of terrible introverted depression. The anti-climax after all the work really set in in a bad way, and that can be very damaging to an artist. I could sit down at the piano and want to write, and nothing would happen. It was like complete introspection time.
"I suppose I had about two months out earlier this year...and that was a break I really needed. It gave me time to see friends, do things I hadn't been able to do for three years.
"It wasn't really as if I was missing out on normality," she laughs. "I'd rather hang on to madness than normality anyway, so it was more like recharging."
But something more came out of it than just a rest?
"Oh yes!" The smile returns. "I felt as if my writing needed some kind of shock, and I think I've found one for myself. The single is the start, and I'm trying to be brave about the rest of it. It's almost as if I'm going for commercial-type "hits" for the whole album.
[I have always been struck by this statement. It seems to me to indicate that Kate really doesn't have a very sound notion of what is "commercial"--which is all to the good, of course. For if she felt that The Dreaming had a commercial sound, then some listeners's criticism that she seemed to have developed a calculatedly commercial sound for the next album, Hounds of Love, loses credence, since her mental image of "commercial" sound is so different from the sound of Hounds of Love.]
"I want it to be experimental and quite cinematic, if that doesn't sound too arrogant. Never For Ever was slightly cinematic, so I'll just have to go all the way."
The shock that Kate refers to, eyes almost ablaze as she uses the word, came months ago...after she started to work with a rhythm machine while she was writing.
"I'm sure lots of things that I'm trying to do won't work," she says, "but I found that the main problem was the rhythm section. The piano, which is what I was used to writing with, is so far removed from the drums. So I tried writing with the rhythm rather than the tune."
Sat In Your Lap, naturally, is the first fruit of the new approach--original (in that it could only be Kate Bush) marriage of pounding drum sounds and two layers of voice. There is a theme, but it's the rhythm that hits you first, blasting right through to the synthesised end--a step that she knows is likely to continue the critical division.
"I was really frightened about the single for a while," she admits. "I mixed the song and played it to people, and there was complete silence afterwards, or else people would say they liked it to me and perhaps go away and say what they really thought.
"Of course it's really worrying, because there's an assumption that if you're one of us, an artist, you don't need feedback at all, when in fact you need it as much as ever, if not more. I really appreciate feedback, and I'm lucky that the people closest to me, my friends and family, are used to me and realise that I've got my own 'bowl of feedback' to rely on."
And that's more important than the public reaction, or do you worry?
"There will always be some who are irritated by me. I seem to irritate a lot of people," she smiles, "and in a way that's quite a good thing."
Nor will the change stop there. Drums, Kate enthuses, are as wide a concept as music itself, and she's determined to go further than "a lazy acceptance of a drum kit." Add that to the news that she'll be working with other musicians on the new album--"the best around"--and it seems likely that "Kate Bush 4" will be one of the big surprises of the year.
