Channels are processed independently in your idea, so it is the straightforward generalization of a module that applies a random (but slowly moving) offset to a single signal.
I’m looking for modules that people will need later that have dependence/crosstalk between different channels. @Eurikon gets the idea, since he suggested a “rotator”, which performs output[n] = input[(n+k)\%N]. Note the channel-dependence. Channel-independence would look like output[n] = f(input[n]). Note the lack of dependence on channel n with any other channels.