1. A system comprising: one or more electrodes recording intended motor actions from input signals; at least one single channel decoder (SCD) in operable communication with the one or more electrodes and configured to decode the input signals; and a demixer in operable communication with the at least one SCD and identifying, sorting, and segregating the decoded input signals of the at least one SCD as motor intent signals corresponding to a particular class of motor actions through use of a learning stage, the demixer being further configured to generate a set of control signals and to output the control signals to an external device, the control signals being based on the motor intent signals, and the control signals controlling the external device, the input signals including at least one of neural signals and muscle signals, the at least one SCD down-sampling and compressing the input signals, and the at least one SCD being configured to calculate an estimate of false positive rate by processing background noise after setting a threshold parameter and to use the estimate of false positive rate to reduce false positives during recording of the input signals and decoding of the input signals.