So, that's one way to get sound to come from two speakers, but it certainly isn't the only way, and may not even be the most efficient way. Whatever it says about stereo I find myself doubting. One does not achieve stereo by copying mono to two parallel tracks. That is simply ludricous, or at least a very bad choice of words. Stereo is achieved by the use of at least two microphones in order to record the same sounds from two physical perspectives (at a minimum). The essential aspect thus achieved is a slight difference in time and amplitude for each sound generating device. Please note that most CDs you can buty today aren't stereo in this srict sense. Rather, they have panned sound to a particular location in the "field" left to right. Neither of this is achieved by copying mono to two parallel tracks. Far more is required to achieve a pseudo stereo from a mono recording--though I certainly know of such work at Stanford, for example. So, what is sox doing? Physical modeling to achieve a pseudo stereo, or copying one sound stream to two sound streams? I will grant you that the sox man pages are awful. On Mon, 6 May 2002, Cheryl Homiak wrote: > Yeah, but it will come through both speakers. And actually, the definition that > i sent you says that changes it to stereo. > > > _______________________________________________ > Speakup mailing list > Speakup at braille.uwo.ca > http://speech.braille.uwo.ca/mailman/listinfo/speakup > -- Janina Sajka, Director Technology Research and Development Governmental Relations Group American Foundation for the Blind (AFB) Email: janina at afb.net Phone: (202) 408-8175 Chair, Accessibility SIG Open Electronic Book Forum (OEBF) http://www.openebook.org