When searching for you are legally safe downloading scores from sources that host scans of old editions (published before 1928 generally) or works by composers who have been deceased for over 70 years (like Ottorino Respighi, who died in 1936, or Alfredo Casella, who died in 1947). For modern composers like Ennio Morricone, you must purchase the PDF or use a subscription service.

Remember to respect copyright for modern artists, always scan your downloads for malware, and most importantly—play every crescendo like you are looking out over the Amalfi Coast. Buona musica!

Markings like Vivace (lively) tell the performer how the music should "feel," not just how fast to play it. From Parchment to PDF