Make sure your volume is not all the way down. You can adjust your Exercise Audio Prompts and Music at the beginning of your workout before you click start. You can choose to have "Audio prompts" or "No Audio Prompts" and you can click to have  "No Music", "Spotify", or "Carrie's Spotify List" and with iOS, you can also choose "Apple Music" or "Your Playlist".

More Android options coming soon.