i have an old CTK-511 (from i think 1998 could be wrong) on it are 100 rhythms and when i dont add the preset accompaniment they are just drum loops. my question is does anyone know if the drum loops are in public domain or if i use them as a drum track in music i write (addin my own guitar/bass) will i have to pay Casio royalties or some form of licensing fee? any info would be immensely helpful