Moreover, purchasing the score supports the continued publication of 20th-century Spanish music. For a student audition, jury, or graduate recital, using a legal PDF is a sign of professionalism.

Absolutely. Cinco Canciones Negras is a standard on voice juries, grad school auditions, and professional recitals. Paying the €12–$15 for the legal PDF supports the composer’s estate and ensures you get a clean, correctly engraved edition (many free scans are missing pages or have wrong notes).