Use telephonize
Use cathedral
Description:
Add and delete default sound effects.
Result:
Note the sound Effect difference.
Code:
            var sound = null;
            function onload() {
                var engine = new jWebAudio.SoundEngine();
                var source = engine.addSoundSource({
                    'url': '../../examples/resource/a.ogg',
                    'preLoad': true,
                    'callback': function() {
                        sound = source.sound;
                        sound.play();
                    }
                });
            }
            
            var teleId = null;
            function teleClick() {
                if (document.getElementById('teleInput').checked) {
                    teleId = sound.addEffect('telephonize');
                } else if (teleId !== null) {
                    sound.deleteEffect(teleId);
                }
            }
            
            var cathId = null;
            function cathClick() {
                if (document.getElementById('cathInput').checked) {
                    cathId = sound.addEffect('cathedral');
                } else if (cathId !== null) {
                    sound.deleteEffect(cathId);
                }
            }
            
            function clearAll() {
                sound.clearAllEffects();
                document.getElementById('cathInput').checked = false;
                document.getElementById('teleInput').checked = false;
                document.getElementById('clearBtn').enabled = false;
            }