Not quite. The crystals hold songs that aren't for fighting or battle. Metafalica is a song that creates land from magic. They're things like that. New songs are crafted in my Cosmosphere for battle. The only thing that was really used for battle that was downloaded was Replekia.

[aaand a breath. That was a pretty good explanation.] Anytime a Hymn is downloaded, it's done in a ceremony. It's... well, someone who knows how to install it is the one who does it. I'm not sure how to explain it, actually.