Close... but not quite. In fact a 'Tracker' is a program that musicians use to write MODs. You compose, playback and manage all your MODs in it. It originates from the old demoscene on the Amigas and C64s and eventually brought over to the PC. (late 80s/early 90s) They would sometimes call the musicians that used these mod trackers 'Trackers' themselves, which could get a little confusing.

It's actually great that such a project exists in the Pascal world. This is a great tool for game development, simply because if youwant to find good musicians that will do your music for free for for a nice low low cost, 'trackers' actually like making music and for the promise of enjoyment are most likely more than willing. Promise to pay them... well think starving artist.