"If I recall, there's a great section on Bruckner in that book, too."
Frankly, it's one of the better chapters I've ever read about Bruckner. However, Gartenberg is highly critical of adding the cymbals; triangle roll, and timpani rolls at the climax of the Adagio in B7 (second movement). I can see leaving out the triangle - which adds very little harm, in my estimation - but it seems ridiculous not to have the cymbals and timpani there. The timpani certainly don't have to play fortissimo at that spot, but I won't keep a B7 that has zero percussion at that climax either.
Barry
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Immer Wieder Polka