Hi... Sorry this is happening for you. What internet browser are you using? The course works best if you are using Google Chrome or Safari. Firefox works ok. And, to be honest, Internet Explorer most likely does not work at all.
To make all of this great audio magic to happen, we're working with the Web Audio API. Please let us know if you continue to have this challenge. That said, depending on your internet bandwidth, please be patient as it may take a while to download the audio files. The good news is that once they are downloaded, you won't have to wait so long.