darrenyeats wrote: > Julf, yes it's a sum of sine waves (kind of, for the purposes of this > discussion) but where do we actually test a sum of sine waves?
When testing for intermodulation. Two is "many", any additional ones are just extension of the same model. A single sine wave test reveals non-linearity, a two-wave test reveals intermodulation effects. What additional things do you think a third or 257th additional wave would reveal? > We know the sampling theorem is proven so the theoretical grounding of > digital audio is beyond discussion. But we know real equipment isn't > perfect. It isn't perfectly linear, it doesn't have instantaneous > infinite power available etc. All I'm saying is that we can reason about > the Fourier Transform in maths, but it might be an assumption too far > that real equipment will obey the mathematical equations. Real equipment will obey the mathematical equations - the only question is if our equations are complete and sufficient. Neither the sampling theorem nor the fourier series (the transform is a mathematical tool) assume (or require) "perfect" equipment. "To try to judge the real from the false will always be hard. In this fast-growing art of 'high fidelity' the quackery will bear a solid gilt edge that will fool many people" - Paul W Klipsch, 1953 ------------------------------------------------------------------------ Julf's Profile: http://forums.slimdevices.com/member.php?userid=42050 View this thread: http://forums.slimdevices.com/showthread.php?t=101003 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
