But what about waveforms which are not sine waves? Now I know that Fourier (I think it was Fourier?) said that they can be broken down into a sum of sine waves, but is it not still possible that a non-sine wave could be at a frequency that's within our hearing range, whereas overtones that may be present in it may not be? Couldn't our ears still tell the difference between that waveform and one that's at the same frequency but doesn't contain the overtones? If you approximate it with a sine wave I still believe that audible information will be lost.

I did not think that DACs would round off the data to produce a sine wave but now that you say it, it seems like the natural thing for them to do.

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Matthew J. Hill
matt@idsi.net