Since it plays modules made for the Amiga, linking this is mandatory: https://bel.fi/alankila/modguide/interpolate.txt
This bit made me go "wat" out loud. > Additionally, it is possible to engage a low-pass 12 dB/oct Butterworth filter tuned at approximately 3.2 kHz by turning the Amiga power LED brighter with a special protracker command.
https://www.youtube.com/watch?v=M8d_OInQkLc&t=8m36s
IIRC when the machine crashed while playing sound, with the well-known blinking of the Power LED, you could hear the filter going on and off, too. And most games that had polished music turned the filter off.