Clarification of methods used to validate surface EMG decomposition algorithms as described by Farina et al. (2014).

to the editor: We are compelled to clarify some points made by Farina et al. ([1][1]). In a previous exchange of letters Farina et al. sought that we “decompose a set of synthetic surface EMG signals that we [Farina et al.] generate with a model” to provide a convincing validation of our sEMG