Re: [sc-users] PanB / DecodeB2

[Scott Wilson <sdwilson@xxxxxxxxxxxx>]

On 4 Jan 2006, at 19:30, fons adriaensen wrote:

> On Wed, Jan 04, 2006 at 01:43:47PM -0500, David Feller Jensenius wrote:
> > I seem to be having a little bit of trouble playing around with the
> > ambisonic stuff in supercollider.
> >
> > I'm trying for a basic test to get a sound to move around in a circle
> > once, but what happens is it's going around several times.
> > I'm converting degrees to radian for this test...  what am I doing
> > wrong?
>
> The documentation is wrong :-(  The range is -1 to +1 going from back,
> left, front, rigth and back again.
>
> I never understood the motivation for this odd choice. I'd expect 
> cycles,
> radians or degrees, but not 'half cycles'.
Most UGens go from -1 to +1 and start at 0. For instance, one can use 
an LFSaw to pan smoothly around in a continuous circle starting at the 
front. without having to mess with its phase or amp. Cheap, I suppose. 
(If you want to specify in radians it's easy enough to do that though.)

This is also consistent with the way that Pan2, LinPan2, etc., work 
(and PanAz, providing you set the orientation right). So pan UGens can 
be interchangeable to some extent.

S.