The Casio HT3000 is a paraphonic instrument, with a single VCF shared by all of its 8 voices; the VCF envelope gets re-triggered with every key stroke.
I guess this can be seen as a limitation, at the same time I really enjoy this feature, because it adds nice artifacts to the sounds and makes them a bit unpredictable!
In this patch, the combined settings of the DCA and VCF envelopes generate a sort of "delay"-like effect when played over a regular bass line.
Hope you like it and thanks for listening!