On Mon, 29 Jan 2007 13:44:28 -0800 (PST) Bill Unruh <unruh@xxxxxxxxxxxxxx> wrote: > > But sound comes with no tag attached, saying it's a 1Hz signal. And > > that's why any DFT has Fsample/Number_of_samples spectral resolution. > > AGain that depends. If you are searching for a sine wave of undetermined > period, you can determine the period far more accurately than that. > I agree that the naive fourier transform will give that result. > > OK, OK, open a startup and/or new science research, claiming the result will be an application/apparatus capable of producing reliable indication of presence of 1Hz spectral component having at input only 1ms == 0.001 second long recording of arbitrary unknown sound. The whole point of real world sound is that it is, essentially, noise, i.e. no apparatus/application can know beforehand what the next sample or analog value is going to be. Regards, Sergei. -- Visit my http://appsfromscratch.berlios.de/ open source project. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
