dc is always the lowest possible frequency, no matter what sr you use. the issue with nyquist frequency is, that if the frequency of a signal is too high (>sr/2), then it doesn't 'fit' into the sample-grid anymore. the only 'limitation' for low frequencies is, that you cannot tell the exact frequency, if your samplefile is too short. let's say, the period of your frequency is 10s, but your sample is only 5s long. how can you tell, that the signal has a frequency of 1/10 = 0.1Hz?
roman On Tue, 2007-05-08 at 15:43 +0000, Bosko Milakovic wrote: > Hi all! > > Maybe it's a stupid question but I was reading this > http://www.dspdimension.com/PDF/DftAPied.pdf and it confused me a bit. > Theoretically, if we have a sample rate at 1000Hz, the highest possible > pitch will be 500Hz. But is there an opposite limit? Is there a "lowest > possible pitch" for different sample rates? Is DC always there no matter > what SR is or the lowest frequency boundary is moving also? > > Bosko > > _________________________________________________________________ > Don't just search. Find. Check out the new MSN Search! > http://search.msn.com/ > > > _______________________________________________ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list ___________________________________________________________ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de _______________________________________________ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
