What does it mean to have items like ext:1/AUDIO/song.mp3 in the playlist?
The playlist contains URLs (Uniform Resource Locators) that are used to locate media streams. The first part of the URL specifies which protocol is to be used when reading the media stream. Some of the protocols that are/will be supported by MMPlayer are ‘ext’ (used to read data from an extension card), ‘int’ (used to read data from RAM), ‘http’/’rtsp’ (used to read data from the Internet). For the ‘ext’ protocol, the number that follows is the volume identifier for the memory card where the file was when it was selected. Palm OS gives each inserted card a unique volume identifier, so if you remove/insert a card, its volume identifier will change.