When I started with music on PDAs I had to use a MIDI modules for anything like decent sounds. One of my favourite modules was for the Visor PDA which had proprietory modules called springboards. The module was about the size of a book of matches, it had 128 midi sounds on board, and a headphone jack. It powered itself from the visor PDA. Nice.
The sound wasn’t bad at all really. The module responded to MiniMusic NotePad and BeatPad software.
The visor was a cool device and the modules were fun too. Shame they didn’t stick around.
More on modules soon…