@carlinmclellan you can do it with the web viewer easily.
[Update]
This is a quick demo just to prove the concept
https://x.thunkable.com/projectPage/60250d9ec0d1251227b520dc
Because you said you only have 7 songs, I created a list of 3 audio files just to prove it works. I created 3 html files each to start a different sound file (of course you can use the Post extension of the web viewer) every time you select a file from the list I assign the corresponding html file to the web viewer to display it.
Happy Thunking