Can anyone help me with some percussion recipes? So far I can produce only weak and inconsistent kick and sort of bell sound
It is really hard to predict the outcome of any tweaks for me. Even by using presets as starting point. Synth without any filter is really a challenge for me.
Try breaking each component of the percussion down with separate instances of the synth. I couldn't really get a good pitch envelope going, so I had to break it down: one mid-range instance (instant attack, very short decay) for the initial impulse, another instance (super short attack, short decay) for the low-mid-range oomph, and the final instance for the low-frequency body (moderate attack, moderate decay).
Trigger these simultaneously. Use compression and saturation to glue them together and make them sound more like a single uniform sound.
For a snare I did similar except the impulse is a noise burst with a longer decay. The noise burst can be done using the "ring" algorithms with both formants max-spread at dissonant intervals, and playing many dissonant notes simultaneously.
Hi-hats I made similar to the snare's noise burst but with narrower formant bandwidths and less notes, for more of a ringing timbre rather than diffuse noise. Use a compressor with a very short attack to bring out a sharp tick
, important for shaping synth cymbal transients.
You can fake a pitch envelope with portamento but the lack of legato requires extra trickery.