A ring mod square wave that is pretty noisy from a Korg Electribe EA 1.
More handdrawn samples made in Milkytracker.
low-quality recording of a distorted guitar chord
Electronic synthesized lo-fi 'percussion' sound created with a VST instrument called NoizDumpster, by The Lower Rhythm. You can find it ...
Experimental QM synthesis resulting sound. Details for the synthesis method can be found at http://www.synthofmine.com/general-thoughts/qm-synthesis/