Dave Smith Instruments SYNTHESIZERS

I have tried to program a drum loop on the Evolver (BD, SD, CYM).
I set OSC3&4 fairly low to Sin, assigned ENV3 to OSC3&4, assigned 
SEQ1 to OSC3&4, assigned SEQ2 to Noise. So far so good, this 
generates a bassdrum/snare pattern.
For the cymbals, I set OSC1&2 detuned to pulse, pitched fairly high, 
set SEQ3 to OSC1&2, set SEQ4 to Highpass on the same beats as SEQ3.
I was hoping that the highpass would a) generate a cymbal sound out 
of the squares, and b) filter away undesired BD beats when 
the "cymbals" are on.
However, setting SEQ4 to highpass has no effect whatsoever.

Can anybody help?