I noticed on the page: http://www.exotica.org.uk/wiki/Soundtracker_History
That Soundtracker Professional was listed with no credits. I searched around and found the software on "DigiTech Utility Disk v5.0 (1989)(Digital Technology).adf".
The intro screen just says Dr. G. See attchement screenshot.
However looking at the design, colors and especially "Soundtracker" logo it seems to be a very early version of the version released on CU Amiga Coverdisk May 1996 (link http://amr.abime.net/issue_639_coverdisks). See also attachment screenshot.
The guide file found in Aminet Set CD's, more precise: Aminet_28\AMINET\BIZ\DOPUS\MAGNUM_OPUS2_2.LHA\
Shouldn't logic tell us that he also made the Soundtracker Professional version too mentiond on the WIKI. The filedate on that DigiTech disk says 20 January 1988, so possibly its from 1987 more precise?SoundTrackerPro 2, module.
This tracker program comes courtesy of Marco Nelissen and can be found on
Aminet or the Aminet CD #14 as "Pro2.lha" in mus/edit. I'm sure this is a
great tracker but there is one problem in that I have never seen anything
else that can play the filetype output from it.