I am discovering new uses for this little beast of cartridge. I am finishing the translation of the minimal SEplayer from MSX Basic to Enterprise Basic. Soon I will show a new video.
It actually plays the following files: MP3, AAC, OGG, WAV, WMA, MP4(audio), and surprisingly MID(Type 0, probably with a modifiable instrument table... ). The Basic program works as a simple DOS command interpreter, you can make a sort of DIR and select the name of a file to play from the cartridge USB port. You even can change the path, enter or leave a directory on the pen-drive disk tree. All made with AT commands on an easy basic listing...
Initially the SE-ONE was designed to also have a MIDI interface, but Hans says that the MSX community showed little interest and it was dropped from the final design. It is reasonable, as there are a lot of classic commercial MIDI cartridges for the MSX range of computers, and a lot of projects made by users. On the other side there is no popular software to manage it.
But Hans says that the UART port was left as a header for communicating with the Arm processor, the hearth of the cartridge, so he proposes to add the MIDI interface idea on a eventual Enterprise SE-ONE cartridge. This, he says, will need a software to be programmed on the Enterprise side....
Another curious application of the cartridge is as a speech synthesizer, an emulator of the SP0256-AL2, exactly the same chip inside the Enterprise Speakeasy interface.... Allophones can be sent to the cartridge by means of an AT command.
He is now hard working on a DAB+(digital FM radio) receiver for the SE-ONE. Once finished he will send me the schematics to add the MIDI interface to the cartridge.
As you can see this concept cartridge is constantly evolving and being improved.