There is no information about polyphony available. The ddrum 4 detects the play position on all channels and use this information to process the sound. Exactly what happens with the sound is, as with Roland, deeply buried in the dataformat and can not be accessed by user. The parameter called Variation alters between different crossfade settings in multi-sampled sounds and other factory preset playing parameters. For every sample there are six Variations to choose between.
Sounds can appear at the main outputs and at an individual output pair at the same time.
The Sounds are adjustable in gain and pan for each output pair. When looking at the quite spartan editing functions, the sound selection of the ddrum 4 becomes more important. Everyone with access to Internet can benefit form it. Not everyone surfs the net, though. Therefore, we will go through the basic sounds.