Comment #7 on issue 3006 by [email protected]: Inaccurate sin/cos values
http://code.google.com/p/v8/issues/detail?id=3006
Responding to #5. Yes I checked the differences. One of the sample points
that is different is caused by computing sin(880*2*pi*55125/44100) =
sin(2200*pi). Since 2200*pi cannot be represented exactly in
floating-point, what you have is a value that is close to a multiple of
pi. In fact, it differs from the exact multiple by about -7.057e-14, so
the sin(2200*pi) should be near -7.057e-14, not 0.
As for hearing a difference, that might be true in this case. But in the
early days of CD, people COULD hear the digitization in very silent
passages, so some CD players added a dither signal to mask the digitization.
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