Hello !
first sorry for my vera bad english, i'm french 
Yesterday I had imagine my kemper can play Wav files directly from the USB Key !
Imagine ! In the Effects module, you select "Sample player", and the parameters is :
- Sample select
- Sample level
- One shoot or infinite loop
If i select one shoot, the sample is played once, and the effect Sample play is desactived at the end.
If i select Infinite loop, I think you know what it's doing !
Imagine if you can choose 3-4 samples in an effet slot by sample, and play then when you want ! 
Is this possible?
thank's