Install libnjb-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libnjb-doc
Description:
Creative Labs Nomad Jukebox library documentation
libnjb is a C library and API for communicating with the Creative NOMAD JukeBox and Dell DJ digital audio. The protocol these devices use is presumably called PDE (Portable Digital Entertainment protocol) at Creative. Newer devices using the Microsoft MTP (Media Transfer Protocol) are not supported. . This package contains the development documentation.
Homepage: http://libnjb.sourceforge.net/
Version: 2.2.7~dfsg0-4build2
Section: universe/libdevel