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Re: [Flightgear-devel] FG sound files
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From: gerard r. <gh...@gm...> - 2009-02-10 12:48:02
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On mardi 10 février 2009, gerard robin wrote: > On mardi 10 février 2009, Erik Hofman wrote: > > alex wrote: > > > Does OpenAL support any other sound file configuration other than .wav? > > > I have problems with OpenAL unable to buffer some ..wav files but runs > > > fine with other .wav files. Does anyone know of a particular reason for > > > this. > > > Your thoughts would be appreciated > > > > Like gerard already mentioned, the WAVE file is a container file that > > can handle about anything from 8-bit to 32-bit sound files either > > compressed or uncompressed. It is even possible to store an mp3 file in > > a file with a .wav extension. The alut wav file loader only handles a > > small subset of them; signed 8-bit, unsigned 16-bit, ulaw and alaw > > compressed and as of yesterday also the IMA4 compression type. > > > > Erik > > Erik is right, > > In addition to my "generic" answer. > > When i get trouble with a sound file ( which happen very often :( ) > I do the following: > > I try to load it with Audacity ( at least version, 1.35 ) > > =>If it load correctly => you can see the curves and you can listen the > sound ==>You check the rate ( 8000, 16000, 22050, 44100, 48000, 96000 ) , > and if required you convert to the right rate. > ==>You check the bits PCM ( 8, 16 , 32 float), and if required you > convert to the right bits PCM value. > ==>Then Export the file to WAV format > > =>If it do not load correctly, try with sox ( version 1.2) > The command line for instance to convert the sound file to 48000 rate 24 > bits PCM is: > sox -S yoursoundorigin.vaw -b 24 -r4800 yoursoundconverted.vaw > > sox will tel you how was the original format of the sound, and convert it. > > Then you can convert again that " yoursoundconverted.vaw" sound to a less > rate and bit values ( Aircraft sound is not HIFI, only NOISE :( ) -r > 8000 -b 8 > > Doing this, i have been able to save a lot of live recorded music done > with an old digital recorder. > > I hope, it should do for you > > > Cheers > > BTW: you will notice that Audacity is very accurate since you can improve > the sound with it, with the filters and effects tools. ouups an error you must read : sox -S yoursoundorigin.vaw -b 24 -r 48000 yoursoundconverted.vaw -- Gérard http://pagesperso-orange.fr/GRTux/ J'ai décidé d'être heureux parce que c'est bon pour la santé. Voltaire |