On Fri, Oct 01, 2010 at 09:36:53AM +0200, Jens M Andreasen wrote: > Another example: Play two sinewaves, 1 Hz apart. Every second they will > cancel out each other completely - even if they undeniably are both > present.
Yes, but this is nothing special. The two cancel at exactly one point in each one second period, and that point need not even correspond to a sample. The 'impulse' example is different: *all* samples are zero except one per period. But OTOH, if you would upsample the impulse signal (or turn it into its analog form), it would not be zero most of the time, and the zero points would be the exception like they are in your example - they just happen to coincide with the samples at the original rate. So in fact that is not really different. Which again illustrates that 'the samples are not the signal', and that any simplistic way to interpret them easily leads to the wrong conclusions. Ciao, -- FA There are three of them, and Alleline. _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev