Sound

public IAudio Sound { get; set; }

[C#]
using (Presentation presentation = new Presentation("demo.pptx"))
{
    ISlide slide = presentation.Slides[0];
    
    // Obtiene la secuencia de efectos para la diapositiva
    ISequence effectsSequence = slide.Timeline.MainSequence;
       
    foreach (IEffect effect in effectsSequence)
    {
        if (effect.Sound == null)
            continue;
        
        // Extrae el sonido del efecto en un arreglo de bytes
        byte[] audio = effect.Sound.BinaryData;
    }
}