Binary descriptions:

adplug-utils: free AdLib sound library (utils)
adplug-utils-dbgsym: No summary available for adplug-utils-dbgsym in ubuntu wily.
libadplug-2.2.1-0v5: free AdLib sound library
libadplug-2.2.1-0v5-dbgsym: No summary available for libadplug-2.2.1-0v5-dbgsym in ubuntu wily.
libadplug-dev: free AdLib sound library (development)

Last common version:

2.2.1+dfsg3-0.4