>>244
ﾌｨﾙﾊｰﾓﾆｱ版のスコアに簡単に解説が載ってるよ。以下に一部を抜粋してみるね。
　
Webern's transcription of the Bach Fugue is not, for all its individuality of conception,
a late contribution to the art of musical transformation.
This must be made expressly clear,
as it can easily be taken for such and for this reason was often the object of heated dispute.
On the other hand it is manifest that Webern did not have in mind a faithful adaptation along the lines of a purist evocation of style.
Similarly there is no doubt about the integrity of his purpose.
As he states clearly in a letter to Hermann Scherchen, printed many times since its first publication,
what he wanted was: to bring the music out of its esoteric,
abstract presentation and make it alive and comprehensible, to bring it closer to the listener.
"My orchestration attempts . . . to reveal the interrelation of motifs. This was not always easy.
It seeks of course in addition to show how I see the character of the work."
Webern knew that this was emotional world of its creator.
Such a risk is doubtless also involved in any performance on the piano.
With the orchestration the difference is only one of degree.
It multiplies the possibilities of estrangement from the original.
　
えーと、「My orchestration attempts . . . 」ってとこですね。
「私の管弦楽技法の試み」って本人が言ってるらしいし、
多分にいわゆる音色結合の実験的作品として制作したってことでいいんじゃない？