Work in progress. Needs the [WAV Player application](https://github.com/flipperdevices/flipperzero-firmware/tree/zlo/wav-player/applications/wav_player) compiled into firmware. Idea and files provided by RogueMaster.
Create a wav_player folder in the root of your SD card. You'll need 8-bit unsigned WAV files (try [Audacity](https://www.audacityteam.org/) for conversion.)
WAV Player is apparently very particular about the format.Okay finally have some results, WavPlayer wants BitExact, NO headers, 48k PCM unsigned 8-bit stereo. Example: