On Saturday 05 June 2004 00:20, Chris Metzler wrote:
> OK, I finally got a big block of time to commit to building plib,
> SimGear, and FlightGear from CVS, only to find that I didn't need
> it.  I was expecting to have to solve lots of problems; instead,
> the builds went like a breeze.  No problems at all.
>
> Unfortunately, running it was problematic.  I guess between
> version 0.9.4 in Debian testing/unstable and the current CVS,
> sound was switched to OpenAL.  I ran into one problem and one
> oddity:
>
> 1.  constant pops, crackles, etc., while error messages of the
> form
>
> } Oops AL error in sample set_volume()! 1.3 for
> /home/cmetzler/Projects/FlightGear-0.9//data/Sounds/coughing.wav
>
> scroll up the screen by the score.  I don't know anything about
> OpenAL; but I'm surprised to have sound problems, since this
> is a system that's been built/tuned for doing audio work, with
> Robert Love/Andrew Morton's patches in place and a lot of
> latency testing done.
>
> 2.  the c172 sound in the cockpit is very different from outside
> it.  From a view outside the cockpit, it sounds like it did in
> version 0.9.4.  But from the cockpit view, it has a high pitch
> and more distorted-sounding noise.  This may be intentional; maybe
> cockpit noise really does differ in such a way (I only wish I was
> a pilot).  But I figured I'd check anyway.
>
> Any advice, especially on #1, would really be appreciated.
> Thanks.
>
> -c

I think #1 is due to the volume scaling set up in the corresponding sound.xml 
config - it looks like the volume level that's generated is > 1.

I had this with all the a/c I've done when the OpenAL switch occurred and had 
to adjust the sound configs to ensure that the max volume wouldn't exceed 1.

LeeE

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