On Mon, Jul 8, 2013 at 6:26 AM, Dave Malham <[email protected]> wrote:
> Hi,
>     This looks good - can't try it at the moment as I am away from my
> Linux machine but I do have a question - the user manual says "The
> spatialization control may be visualized as moving the sound source
> across the surface of a hemispherical dome enclosing the listener" but
> this implies only one hemisphere (presumably upper) in use as I can't
> see any way of switching to  lower hemisphere.
>
>       Dave
>

Hi Dave. Don't worry--you have time to get to a Linux machine as the
interface and effects in the demo have not been released yet. What's
described in the documentation has been in Non Mixer for 5 years or
so. Documenting the recent changes is still on my TODO list.

That being said, currently the new interface shares the property of
the old in only representing the top hemisphere. I've played around
with multiple views to allow manipulation of negative elevation, but I
decided that it was too confusing for the user, especially considering
A) the extremely small number of people with periphonic rigs and B)
the even smaller number of *musical* scenarios where a sound source
should emanate from below the listener. Still, during that demo, most
of the time the crow was actually below the horizon due to the fact
that I automated its flight path rather carelessly by clicking the
mouse at random points on a Control Sequence in Non Timeline (and the
automation input is not bound by the top-only constraint that the
interface is).

If you care to share your use-case for negative elevations--I'm ready
and willing to be convinced of their utility. I was just planning to
ignore the issue until such time as I reimplement the interface using
OpenGL--where the ability to  move the camera and display more visual
cues to its orientation would make manipulating points over the entire
sphere more usable.

Although the demo video shows the source positions being automated,
that is not actually a very likely use case IMHO. It was merely done
to highlight the effect. The actual use case is positioning
instruments on a stage (such as an orchestra).
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