Around 10 years ago, Digimpro came out with something similar; they introduced a custom audio format and a standalone player that let you change playback parame

Around 10 years ago, Digimpro came out with something similar; they introduced a custom audio format and a standalone player that let you change playback parameters and switch between alternative tracks: http://web.archive.org/web/20051215034341/http://www.digimpro.com/about.htm http://web.archive.org/web/20051215034341/http://www.digimpr... Don't know what happened to their technology later on.