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On Friday 12 November 2010 17:47:08 gene heskett wrote:

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> On Friday, November 12, 2010 11:43:42 am Eric Kampman did opine:

> > On Nov 12, 2010, at 1:40 AM, Jens M Andreasen wrote:

> > > On Thu, 2010-11-11 at 20:22 -0800, Eric Kampman wrote:

> > >> Since power is proportional to signal squared, this means ..

> > >> .. L(t) =3D cos(t * pi / 2) and R(t) =3D cos((1 - t) * pi / 2)

> > >=20

> > > I think you misspelled one sin(), no?

> >=20

> > No, turns out the 2nd equation is equivalent to sin(t * pi / 2) I think.

>=20

> And is computationally less expensive if you drop the pi / 2 and use

> pi * 0.5 as mulls cost less than divs.  Or at least this is true if its n=

ot

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> handed off to an FP processor. ;-)

Even faster: Use a pre-computed value of pi/2 or pi*0.5. I don't think=20

compilers will already optimize such a constant part of an equation.
Arnold
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