I can't answer your question, but I can offer a suggestion. Why don't you load all the songs onto your phone and play them through Android Auto? If you don't have enough storage space, flash cards are really cheap these days.
I hadn't thought of that. Makes sense, though...... I have loads of songs and playing them from phone and also running Google maps (over internet) keeps my phone burning hot all the time..
So I refrain from doing this exercise.