GPIO Tracker v1.0 by Dorktronic & Deadline / Cityxen - So this is a totally random post, and I know almost nothing about this software other that it is specific to some hardware created by Dorktronic that is used for making music?  The software somehow coaxes the user port into talking to this hardware and possibly results in outstanding results when controlled by a human superior in musical talent than myself.  Here are some relevant links I found related to the topic:

https://www.forum64.de/index.php?thread/112172-gpio-tracker-v1-0/&postID=1638678

https://www.commodore.news/news/item/8915/de/desktop

https://www.youtube.com/watch?v=Opf6GL9stzQ

https://github.com/cityxen/GPIOTracker