
I purposely use an Alesis q25 for playing my hardware modules since it has both usb and midi din connectors going out, as do a few other new midi controllers but not many. Now you must buy (expensive) usb "host" boxes such as the Kenton and Midiplus to add the DIN connectors to keyboards or modules that do not have these.

In doing so, they stripped out the hardware ICs and software routines that were used universally for all original midi music and even lighting equipment for automation. It is again unfortunate that for the sake of economy I suppose, many hobby keyboards and even some supposedly pro boards have eliminated the original DIN style interfaces which in addition to being a universal standard for connecting midi music instruments, also had a developed "language" so instruments could speak to each other.

Or you can use the "legacy" midi din connectors for directly connecting the MX49 to any other midi device with midi din connectors. The MX49 does have both I believe which means you can use this as a usb out device to your computer for using music software programs to control it, as you can with the CTK through it's USB connection.

Unfortunately the Casio CTK6200 does not have "legacy" midi din in or out connectors, only the USB connector which eliminates it for using to trigger the MX49 unless you use a computer as an intermediary connection between the MX49 and the CTK.
