Arp drumkit mode question

[dune_rave]

Somehow I can't hear drumkit playing.

This is what i do:
Choose a preset where one layer1 is used.
Activate the layer2, and set its arp to drumkit mode.
Set arp on, choose drumkit preset.
The arp plays, but only hear it triggers layer2 synth sound.
When I turn down layer2 oscs, I still see arp drumkit playing, but dont hear drums.

Please tell me what is wrong here!

[dune_rave]

Hm, the manual writes a short sentence about the arp drumkit and the additive oscs and sfz files. I think this is the solution...