[Openal] Artifacts - Alternating from left to right channels?

[Daniel PEACOCK]

>> - I tried setting a proper orientation and all the sources at 0,0,0 with
>> velocity 0,0,0 - artifacts gone

It would be interesting to narrow it down to a position or velocity
problem.   Then it would be interesting to see what parameters values are
being passed to AL.

NOTE : Velocity is rather tricky to get right.   By default, units are
assumed to be in meters.  If your units are not in meters then you need to
set the AL_METERS_PER_UNIT listener property to an appropriate value that
will be used to scale all the 3D values you pass into AL.

Dan
Creative Labs (UK) Ltd.

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             Ashley McConnell                                              
             <ashley at siroccora                                             
             cing.com>                                                  To 
             Sent by:                  openal at opensource.creative.com      
             openal-bounces at op                                          cc 
             ensource.creative                                             
             .com                                                  Subject 
                                       Re: [Openal] Artifacts -            
                                       Alternating from left to right      
             02/19/2009 05:04          channels?                           
             PM                                                            
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           







Daniel PEACOCK wrote:
>
>
> Hi Ashley,
>
> Are you setting Listener position and orientation?   One explanation
would
> be if the listener orientation was being updated with bad values causing
> AL
> to think the listener is rapidly changing direction - which could cause
> all
> the sounds to pan around rapidly.
>

Hi Daniel,

I've tried a couple of experiments.

- I tried setting a static orientation each update, the artifacts were
still
there
- I tried setting a static orientation and all the sources at 0,0,0 with
velocity 0,0,0 - artifacts gone
- I tried setting a proper orientation and all the sources at 0,0,0 with
velocity 0,0,0 - artifacts gone

This of course means it is essentially working in 2d / mono.  I am setting
the positions directly from the physics so i'm not sure what can go wrong
there.

Can you think of anything i could of messed up?

Thanks again for the help
All the best,
Ash

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