Okay, so I’m making a presentation and i have already put background audio on it. Now, the
problem is, I want to add my voice -which i already have recorded- over the music.
If I add my voice, the music stops playing. Is it possible for me to play
two audio files at once?
No, not yet. You can only play one audio file on the same time. You have to mix the files before importing it to Slide Effect (using Audacity for example).