My go at a Vangelis-like trumpet sound. Velocity controls the filter, thus the sharpness of the sound. Aftertouch can re-open the filter after the Filter envelope has gone down to the sustain level. The Mod Wheel adds more detune to the oscillators, leading to a more metallic timbre (don’t overdo it).
Put some ice cold plate reverb on it, and maybe some echo, and you’ll be rewarded with a heroic yet mysterious trumpet sound!