Create realistic round robin sample playback. These devices will allow randomized sample playback without repeating the same sample twice or repeating the same bunch of samples. Depending on the number of total samples they will either make sure the next note is none of the previous 5 notes or previous (number of notes - 2) notes. They also allow sequential or palindrome playback. RRsampler works on the sample chain of Sampler. RRchains works on the chain selector of an Instrument Rack.