The example you have for adding audio doesn't seem to work, everytime I click on the audio icon, it doesn't have sound with it.
Also, is it possible to add a image and then attach a mp3?
shape.Data = presentation.WavAudios.Append(File.ReadAllBytes(@"F:\download\Moves Like Jagger.mp3"));
shape.Volume = AudioVolumeType.Medium;
Presentation presentation = new Presentation();
Rectangle rec = new Rectangle(100, 100, 200, 200);
IAudio shape = presentation.Slides[0].Shapes.AppendAudioMedia(@"F:\download\Moves Like Jagger.mp3", rec);
//change the picture of the audio
shape.PictureFill.Picture.EmbedImage = presentation.Images.Append(Image.FromFile(@"D:\spire.office\Demos\DocDemos\Data\Footer.png"));
//embed the audio data to the presentation
shape.Data = presentation.WavAudios.Append(File.ReadAllBytes(@"F:\download\Moves Like Jagger.mp3"));
// set volume to Medium
shape.Volume = AudioVolumeType.Medium;
presentation.SaveToFile("Audio.pptx", FileFormat.Pptx2010);