I have a great luck using the big buddy with my duo, unfortunately every once in a while, the drums will get either extremely soft, or completely fade out while the songs play. Sometimes it’s when I change to one of the main beat, other times it is just randomly in the middle of a part that is playing. It doesn’t happen very often, and I can’t seem to reproduce it At will. I don’t know if the unit is defective, or if it is a software or firmware issue. I really need this to work, so please try and respond ASAP.