frankly i do it the simple way andcan get great synth tracks just by connecting the casio to sound card line and record away
as analog. providing you have a good clean sound card like an audiophile the man in the street buying your records wont notice a difference imho as an engineer.
if you MUST do midi , its very simple. in your midi sequencer on the pc set up the receive channel of the seq to match the casios send midi channel. normally channel 10 isfor midi drums. so for example set channel 1 on the casio to send the note ons and offs, and the same channel 1 in your sseq sw to receive.
on the output side , same deal on the pc midi output side.
a simple way is to set 16 midi tracks on your pc seq to midi channels 1 thru 16, then each time you do a new track just change the channel send number on the casio.
the IDEAL way of doing it is to keep the casio kbd for note input
to the pc sequencer then connect midi out of pc to ANOTHER
midi device like a roland sound canvas with no keyboard. ie ; just a midi sound module being fed by pc midi out.
read some of my articles in the newbies section pages 1 and 2.
i think you will find them interesting. covering all aspects of recording and songwriting and studio equipment and engineering etc.