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(openal.info)Reverb

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Reverb
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     #include <AL/al.h>
     #include <AL/alc.h>
     #include <AL/alkludge.h>
     #include <AL/alut.h>
     
     #include <time.h>
     #include <stdio.h>
     #include <unistd.h>
     
     static void init( void );
     
     static ALuint reverb_sid = 0;
     
     static void *wave = NULL;
     
     static void init( void ) {
     	ALfloat zeroes[] = { 0.0f, 0.0f,  0.0f };
     	ALfloat back[]   = { 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f };
     	ALfloat front[]  = { 0.0f, 0.0f,  1.0f, 0.0f, 1.0f, 0.0f };
     	ALuint boom;
     	ALsizei size;
     	ALsizei bits;
     	ALsizei freq;
     	ALsizei format;
     
     	alListenerfv(AL_POSITION, zeroes );
     	alListenerfv(AL_VELOCITY, zeroes );
     	alListenerfv(AL_ORIENTATION, front );
     
             alGenBuffers( 1, &boom );
     
     	alutLoadWAV( "l2.wav", &wave, &format, &size, &bits, &freq);
     
     	alBufferData( boom, format, wave, size, freq );
     	free(wave); /* openal makes a local copy of wave data */
     
     	alGenSources( 1, &reverb_sid);
     
     	alSource3f(reverb_sid, AL_POSITION, 2.0, 0.0, 4.0);
     	alSourcefv(reverb_sid, AL_VELOCITY, zeroes);
     	alSourcefv(reverb_sid, AL_ORIENTATION, back);
     	alSourcei (reverb_sid, AL_BUFFER, boom);
     
     	alReverbScale(reverb_sid, 0.6);
     	alReverbDelay(reverb_sid, 0.3);
     
     	alAttenuationScale(0.3);
     }
     
     int main(int argc, char *argv[]) {
     	alutInit( &argc, argv );
     
     	init( );
     
     	alSourcePlay(reverb_sid);
     	sleep(10);
     
     	alutExit();
     
     	return 0;
     }