Martin: It sounds like you're extrapolating from experience with analog systems that achieve similar results. Fortunately, the science has become much more sophisticated. I say that's fortunate because the results can be much much better than those we've heard on analog tape decks. Generically, the process is known as "Time Scale Modification." I bet a good way to begin to come up to speed on that would be a google search on this phrase. On Mon, 19 Nov 2001, Nicolas Pitre wrote: > On Mon, 19 Nov 2001, Martin G. McCormick wrote: > > > My question is whether or not it is possible to sample at > > rates that are deliberately non-standard in order to simulate the > > effect of a continuous speed control. > > You can't expect most soundcard to do any samplerate. > > > This may sound totally off-topic, but a digital Talking > > Book player has to be able to vary its sampling rate in order to > > emulate a speech compressor. > > Absolutely not. The technique to do that involves duplication and/or > supression of signal patterns based on period windows. This is perfectly > doable in software without altering the samplerate at all. Since this is > performed numerically you can have much better results than any conventional > methods. > > > Nicolas > > > > _______________________________________________ > > Blinux-list@redhat.com > https://listman.redhat.com/mailman/listinfo/blinux-list > -- Janina Sajka, Director Technology Research and Development Governmental Relations Group American Foundation for the Blind (AFB) Email: janina@afb.net Phone: (202) 408-8175 Chair, Accessibility SIG Open Electronic Book Forum (OEBF) http://www.openebook.org Will electronic books surpass print books? Read our white paper, Surpassing Gutenberg, at http://www.afb.org/ebook.asp Download a free sample Digital Talking Book edition of Martin Luther King Jr's inspiring "I Have A Dream" speech at http://www.afb.org/mlkweb.asp Learn how to make accessible software at http://www.afb.org/accessapp.asp