Here, many source recordings are combined in the creation of a single soundscape experience. Producers who commonly use this approach include Bernie Krause, Ruth Happel, and Hans Ulrich Werner. Some producers use their field recordings as raw material for electronic transformations and manipulations. Or, they may slow down or speed up the source recording as an exploration of the nature of that sound. The transformation approach can be heard in the works of Hildegard Westerkamp and Claude Schryer.
Some composers add human instruments or voices to the mix.
These producers are generally part of the vanguard of modern composition, with the resulting works being, at times, quite challenging to mainstream musical notions. Douglas Quin, Barry Truax, Paul Winter, and David Rothenberg are among those pursing this path. Recognizing our Acoustic Ecology Most of today's environmental sound composers are explicitly interested in exploring the meeting place of nature and culture. They aim to create a deeper appreciation for nature's richly diverse voice, or to raise questions about the effects of humanity's noise on us and on our neighbors in nature. The work of these producers is aimed at affecting us, at changing our experience or enlarging our perspective, much as writers and filmmakers can affect our world views.