It is probably a question of the songwriting approach and the intention.
Often enough I have an idea about a particular instrument to use before the style is clear. Reducing the style search to styles with such an instrument would already ease and speed up the search process a lot.
In a second step I would then search for the best realtrack to fit with the song and chosen style.
Using an audio example for the search is also a very nice idea, but might become too complicated to be implemented.
Let's keep it simple and pragmatic. That increases the chance for a solution in short time.


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