http://www.c-thru-music.com/cgi/?page=prod_axis-64 http://www.c-thru-music.com/cgi/?page=prod_axis-64 is an alternative. There are many others like it if you lo

http://www.c-thru-music.com/cgi/?page=prod_axis-64 http://www.c-thru-music.com/cgi/?page=prod_axis-64 is an alternative. There are many others like it if you look around. I dinked around with a prototype iPhone app for this before the iPad was a twinkle in Jobs' eye. Someone's probably got out an iPad app for this by now.