12 Nov
2010
12 Nov
'10
4:44 p.m.
On 11/12/2010 03:08 PM, Eric Kampman wrote:
Thanks. I don't understand the square root though.
The equation is even
more expensive processor-wise than the straight cos.
the SQRT2 is a constant := sqrtf(2.0f), usually defined as M_SQRT2 in
"math.h"
qtractor computes the panning coefficients each turn they get changed.
then it applies through regular gain to each steaming channel as usual.
just const mul over a vector/block/buffer, whatever
Granted, you're quoting someone else, but maybe
someone out there knows.
i'm no expert but i'm sure Ralf quoted me :)
On Nov 11, 2010, at 9:40 PM, Ralf Mardorf wrote:
>
> In January Rui at Qtractor devel-list wrote:
>
> stereo panning in qtractor follows an "approximated equal-power"
> trigonometric formula: L = SQRT2 * cos(pan * PI/2); R = SQRT2 * sin(pan
> * PI/2), where pan value ranges from 0 (full-left) to 1 (full-right).
>
seeya
--
rncbc aka Rui Nuno Capela
rncbc(a)rncbc.org