Creating a "full" SoundFont of this kit is non-trivial. A complete version goes beyond simple one-shot samples. It must replicate the D4’s unique artifacts: the way a cymbal fakes a bell tone using a filtered noise spike, or how the hi-hat pedal introduces a specific velocity curve that the original ROM chips used. A proper "Full Alesis D4 13" SoundFont contains:
The original D4 did not have "humanization." To get the authentic feel, quantize your MIDI to 16th notes at 120-140 BPM, then add a slight random shuffle. Do not over-velocity. Keep kicks at 127, snares at 110, hats at 80. Soundfont Full Alesis D4 13