kozy..... I'm not sure just what info you are looking for, but the manufacturer can be found at www.keysoftservice.ch/ and you might get some info at www.keynotepublications.com .... as a 'gigging' musician, I feel the greater options of the hd sx-6, particularly alpha sort, makes it a better choice than the hd sx-3 ..... however, others on this site will no doubt give you other info as well ....
t.