>> Surely this is only at twice the audible frequency ? We >cannot physically >> hear 44KHz sound but we sample at that rate because its the >nyquist value >of >> 22KHz which is the upper bound of our frequency range ? > >Actaually we have to sample at 44kHz in order to get the >frequencyes up to >22kHz. If you sample at 96kHz you get frequency response up to >48kHz. You >can read more about that here: >http://homerecording.com/digitalmath.html
yeah => nyquist value = 2 * highest frequency in the signal eg what you need to sample at to prevent aliasing at the highest frequecy If you think about the trivial case - a sine wave goes up and down once every second (1Hz) , if you take a sample a 0s and 1s (1Hz) you're going to miss the oscillation and actually end up with something that can only vary at 0.5Hz --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
