A lot of insights can be drawn out of the kind of music you listen to.
You tend to listen to the kind of music you are in the mood for, this mood factor can be used in case of apps like Calm etc to specialise therapy accordingly. You could also recommend podcast according to the songs that the person listens to.
It looks like your idea was posted a while ago but, unfortunately, it hasn't gathered the minimum amount of votes to stay active in the Ideas Exchange (50 votes in the first 3 months). I'll mark your idea as "Closed - Not Enough Votes". You can learn more on how the Ideas Exchange works here.