From Brainbeat IV; "mathematica2 by pvcf playing time: 3.20 play: jsr $1003 and after $80 rasterlines ldx#$02 jsr $1591. ...this is the disqualified trackmotune for our next trackmo. its a little bit too hard and too fast (around 180 bpm). the 3rd voice is doublespeeded and needs only 3-4 rasterlines. the filters are realwave programmed and the overlapping filtereffects are only possible with dmcs up to v4.xx. i needed over 3 weeks to compose this tune and it seems that nearly nobody likes the zak, bad luck. listen to it only on new sid! the drumline is the hardest which i've ever done on the sid and it is emulating a bit of breakbeats, but only a bit... .. ."