Most of these videos I believe were created with Paulstretch, an open source audio time stretching application specifically optimized for creating nice ambient

Most of these videos I believe were created with Paulstretch, an open source audio time stretching application specifically optimized for creating nice ambient textures for very long stretches. Paul Nasca gives a brief overview of the algorithm here: http://www.paulnasca.com/algorithms-created-by-me#TOC-PaulStretch-extreme-sound-stretching-algorithm http://www.paulnasca.com/algorithms-created-by-me#TOC-PaulSt...