I'd say ambisonics. Even stereo reductions are
quite impressive.

>
> A general question about pan opcodes (including UDO's):
>
> Which of the available options give the clearest spatial
> localization?
>
> I understand that many acoustical factors are involved in
> achieving two- or three-dimensional imaging, but would
> like advice as to which Csound opcodes create the *most
> precise* positioning in the stereo (or quad) field.
>
> I've always been disappointed that my attempts to position
> sounds have largely fallen flat, and not been perceptually
> apparent in any very specific sense. (I've used the pan
> opcode.) In a nutshell, I'm looking for Csound code that
> can better project perceptual space.
>
> Thanks for sharing your experience.
>
> Art Hunkins
>
> ----- Original Message -----
> From: "Steven Yi" 
> To: 
> Sent: Friday, October 27, 2006 3:27 PM
> Subject: Re: [Csnd] MIDI Pan Curve
>
>
> Hi All,
>
> Just wanted to note that I did a bug fix of this panning
> UDO today (hard left gave NaN for right channel signal)
> and have renamed it to pan_gm2 as it's a recommendation
> for General Midi 2 implementors.  If you've downloaded
> this UDO please try downloading again here:
>
>
http://www.csounds.com/udo/displayOpcode.php?opcode_id=90
>
> Thanks!
> steven
>
>
> On 10/26/06, Steven Yi  wrote:
> > Hi All,
> >
> > I came across a document today called "Default Pan
> Curve" on the MIDI website:
> >
> > http://www.midi.org/about-midi/specshome.shtml
> >
> > and have implemented it as a UDO here:
> >
> >
>
http://www.csounds.com/udo/displayOpcode.php?opcode_id=90
> > > It's described in the spec as:
> >
> > Over the course of the development of MIDI, different
> > manufacturers have implemented
> > their own responses to CC#10. In addition, various
> > AMEI/MMA Specification (such as GM2 and
> > DLS2) have recommended response curves that are not all
> > the same. The different pan curves produce
> > an equal power distribution between the left and right
> > channels, but in some cases, a true center could
> > not be achieved by following the recommended equation
> > directly. The formula in this RP does achieve a
> > true center and uses an equal power distribution, which
> is desirable. >
> > The formula given is:
> >
> > Left Channel Gain [dB] = 20*log (cos (Pi/2*
max(0,CC#10
> > – 1)/126) Right Channel Gain [dB] = 20*log (sin (Pi
/2*
> max(0,CC#10 – 1)/126) >
> >
> > I realized just now that I've rescaled the values to be
> > between -1 and 1 which is what I'm accustomed to, but
> > then naming it pan_midi doesn't make that much sense
> > then.  Would anyone have a recommendation on what to
> call this?  And should a pan_midi which takes in 0-127 be
> added? >
> > Thanks!
> > steven
> >
> --
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>
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