Phil Leigh Wrote: > Yep - they are all square waves - with different m/s ratios but > certainly all square waves...
OK, so that accounts for the confusion before. In any case the particular "square wave" you would get from SPDIF encoding a pure sine wave at 1 kHz will have a bump in its spectrum at 1kHz, because it's close to being exactly periodic with that frequency, and via correlated jitter that can affect what you hear. ekzdude Wrote: > > I just wanted to point out that square waves, although they have a > nominal frequency, are really composed of an infinite number of > sinusoidal signals. > Yeah, that's true. You can write my kind of square wave (meaning like the top image here http://en.wikipedia.org/wiki/Biphase_Mark_Code) as sq(t) = Sum[ (1/n) * sin(n t) ], where the sum is taken over odd integers n from 1 to infinity. If you truncate the sum because your scope can't resolve arbitrarily high frequencies, you get the kind of trace you're seeing there. And as you can see, the fundamental is the largest component, but all overtones are there too, just with less and less power as you go up. -- opaqueice ------------------------------------------------------------------------ opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=24670 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
