The Carillon Organito (カリヨンオルガニート, kariyonoruganiito?) is a special device that only appeared in the story of the CD Ar tonelico Hymmnos Musical: Spica ~A Heart-Crafted Gift~.
It's an artifact made from Parameno Crystals which was made by a young girl in Firefly Alley, who happened to be friends with Ilya. Having Parameno as its main components allows it to absorb feelings and sounds, which in the presence of a Grathnode Crystal, can be released in the form of a great power. This can serve to strengthen the powers of a Reyvateil or allow Humans to sing Song Magic.
As it should be obvious, it was thanks to this artifact that Spica became the only human so far in the series to sing effective song magic.