Poppe's words on Speicher:
"Musical phenomena are never abstract. The idea behind Speicher is the search for extremes—extreme condensation, thinning, acceleration, broadening. For the piece to be able to continue and remain interesting, it is important—besides diversity—for the audience to be able to recognize certain parts. Anything can be recognizable—a single sound as well as a complete formal structure. Therefore it seems less important to keep inserting new ideas into the piece but rather to create an unpredictable network of derivations. The next step would be to be able to foresee what will happen next. Thus, an active way of listening would be created. But, in a reservoir [“speicher”], things always get into a mess anyway."