You will need a real MSX1 or MSX2 computer and a cable to connect your Android to it.
Check the application page to get the cable pinout:
You can choose playback speed between 1200bps, 2400bps and 3600bps.
When playing, don't forget to turn the volume up.
* Support to select files inside MSX Cas files.
* ROM files are 32K max. Not all ROM files will work.
* Not loads piggybacked ROMs (eg.: with SCC)
* Mostly BIN files requires an .BAS loader with some type of POKE to run. Try asking other users on http://www.msx.org forums.
This application works like CasLink2, OTLA and others.