No audio from speaker

[Codisimus]

Everything seems to be working for me except the audio file doesn't actually play through my speaker.

• I can tell that it is successfully connecting to the speaker as it interrupts music and sometimes plays the 'cast ding sound'
• the audio files, which are generated from text, play correctly on my computer
• I have tried using different speakers but each had the same result

Can't figure out what is going wrong.