1. An apparatus comprising: a circuit configured to: receive a plurality of samples of an input signal; generate an output signal based on the plurality of samples of the input signal and one or more updatable parameters; update the one or more updatable parameters based on the plurality of samples of the input signal; accumulate retuning values based on the plurality of samples of the input signal; and in response to an error condition, generate one or more retuned parameters based on the retuning values and replace the one or more updatable parameters with the one or more retuned parameters.