Re: Is it possible to save 3D sound to file, instead of playing it?

On 04/30/2013 02:01 PM, Scott Jones wrote:
> Hello,
>
> I am trying to find a suitable library for an internal project.
>
> All of the examples I saw were for playing 3D audio. Is it possible to
> create 3D audio and save it to a file instead of playing it?

Hi.

With OpenAL Soft, you have a couple ways. One option is to use the Wave 
Writer backend. The downside of this method is that it needs to be 
explicitly setup in the config file to be used. However, this will 
automatically write out audio to a .wav file in real time, starting from 
when an ALCcontext is created.

A second option is to use ALC_SOFT_loopback[1]. Using this extension, 
you can handle everything in-code (no need to mess around with config 
files), and have OpenAL Soft mix audio as fast or slow as you want, 
although you'll be responsible for writing the wave file (making the 
appropriate headers, etc).

If you have Rapture3D, there's AL_EXT_FOLDBACK[2]. This extension also 
allows you to handle everything in-code, although it's limited to stereo 
and the sound will still play through the audio device.


[1] http://kcat.strangesoft.net/openal-extensions/SOFT_loopback.txt

[2] 
http://icculus.org/alextreg/index.php?operation=op_showext&extname=AL_EXT_FOLDBACK
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