Fun fact: the tracker songs recorded from real amigas (or faithful emulations) have a certain nuance to the samples which you learn to recognize, due to that ev

Fun fact: the tracker songs recorded from real amigas (or faithful emulations) have a certain nuance to the samples which you learn to recognize, due to that everybody disabled the D/A low-pass filter back in the day, which is normally really required after a D/A to reproduce the actual analog samples. So you got a higher pass-through of some of the higher frequencies contained in the played samples (as the original filters were too wide and cut into the real data), but also you got higher aliasing harmonics, that shouldn't be there but kind of make it sound better in total. Actually, in music production you often add filters in the chain that artificially create harmonics to "excite" the audio and make it more interesting for the ear. This was kind of an unintentional exciter :) On the Amiga 500, the D/A filter was switchable by software, by toggling the power LED. I'm pretty sure some engineer thought it was crippling to have the filter there permanently online, and sneaked in a toggle feature but couldn't find any free GPIO :) More in depth description of the D/A reconstruction filter and mod-player emulation issues arising from it: https://bel.fi/alankila/modguide/interpolate.txt https://bel.fi/alankila/modguide/interpolate.txt