Casio CZ/ VZ/ FZ - Pro Series

I appreciate all the suggestions you guys are making, a shame none of them are working.

I tried limiting the low level output buffer to 1 byte, 1 buffer, with the  buffer delay at 1ms. First it said the number of buffers is 1, so it will default to 2. When I tried to send/receive (F0 44 00 00 70 10 20 70 31) there's an error telling me there are not enough buffers available, and that there isn't enough memory to complete the task. It gives me this error for any number of buffers less than 7. At 7 or above, it gives me the usual result. (nothing) I've tried setting it to other things, like 1000ms between buffers, as I figure a slower rate would be more effective. But I still get nothing.

Before I suspect the CZ is defective, I may try the sound card game/MIDI port approach, I never knew about that. Come to think of it, the local electronics hobbyist shop has an old PC with a sound card that actually has a standard MIDI port on it, I may look into getting it although it might be an ISA card.