[Bug 30811] Music in Alpha Centauri stutters

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=30811

Ernest Skrzypczyk <erni.berni at vp.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |erni.berni at vp.pl

--- Comment #6 from Ernest Skrzypczyk <erni.berni at vp.pl> 2012-12-01 18:56:48 CST ---
The following scripts are for fixing the symptoms, not the problems source,
which lies somewhere within games and/or wine sound engine.
    Use these scripts from games directory. The first one is necessary, the
second one not really. Both use Sound Exchange. Original audio files are not
overwritten, but modified copies are made and then linked as primordial
directory. Dithering is also added with no resampling. These scripts could be
used with PlayOnLinux.
----
DIR0=fx;DIR1="$DIR0.org";DIR2="$DIR0.mod"; if [ ! -d "$DIR1" ]; then mv -v
"$DIR0" "$DIR1"; fi; if [ ! -d "$DIR2" ]; then mkdir "$DIR2"; else rm -v
"$DIR2"/*; fi; for FILES in $DIR1/*.wav; do FILE="`echo $FILES|rev|cut -d '/'
-f 1|rev`"; sox "$DIR1/$FILE" --norm=-1 "$DIR2/$FILE" pad 0.1 2.4 rate -v 22050
dither; done; cp -nv "$DIR1"/* "$DIR2"; if [ ! -L "$DIR0" ]; then ln -sv
"$DIR2" "$DIR0"; fi;
----
DIR0=voices;DIR1="$DIR0.org";DIR2="$DIR0.mod"; if [ ! -d "$DIR1" ]; then mv -v
"$DIR0" "$DIR1"; fi; if [ ! -d "$DIR2" ]; then mkdir "$DIR2"; else rm -v
"$DIR2"/*; fi; for FILES in $DIR1/*.mp3; do FILE="`echo $FILES|rev|cut -d '/'
-f 1|rev`"; sox "$DIR1/$FILE" --norm=-1 "$DIR2/$FILE" pad 0.1 2.4 rate -v 22050
dither; done; cp -nv "$DIR1"/* "$DIR2"; if [ ! -L "$DIR0" ]; then ln -sv
"$DIR2" "$DIR0"; fi;
----
    It seems the sound buffer doesn't quit the right way on "cpu review your
options.wav". I did not find any significant offset in the audio, so maybe some
other factors play a role here. However looping occurs on the last seconds of
sound file, that probably stays in buffer forever, since it doesn't quit right.
Therefore using soxs pad function (extending original audio file) fixes the
problem.
    Clicks and stuttering seem to be related to sound file amplitudes, so
reducing gain (sox INFILE OUTFILE gain -3) or normalizing audio to lower level
like in the scripts fixes that problem.
    Resulting sounds in the game play more nicely with no stuttering, clicking
and looping. They are a bit delayed, however this seems to be a problem of game
engine.
    If problems with long sound files occur, one could loop them (sox INFILE
INFILE INFILE OUTFILE).

Wine-1.5.12-157-gbdf9a9f
from repository
OpenSUSE 12.1 x86_64
AMD FX Bulldozer 8150
Asus M5A99X EVO
G.Skill 16 GB DDR3-14900
AMD/ATI Radeon HD 4850 with Fglrx 12.4

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